CVE-2025-21971

一、漏洞信息
漏洞编号：CVE-2025-21971
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
CVSS V3.0分值：
BaseScore：N/A None
Vector：CVSS：3.0/
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.
漏洞公开时间：2025-04-02 00:15:28
漏洞创建时间：2025-04-02 01:01:09
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2025-21971

更多参考(点击展开)

参考来源	参考链接	来源链接
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/003d92c91cdb5a64b25a9a74cb8543aac9a8bb48
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7a82fe67a9f4d7123d8e5ba8f0f0806c28695006
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21971	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2025-21971	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2356598	https://bugzilla.suse.com/show_bug.cgi?id=1240799
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21971.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1240799
anolis		https://anas.openanolis.cn/cves/detail/CVE-2025-21971
mageia		http://advisories.mageia.org/MGASA-2025-0142.html
osv	https://git.kernel.org/stable/c/003d92c91cdb5a64b25a9a74cb8543aac9a8bb48	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/7a82fe67a9f4d7123d8e5ba8f0f0806c28695006	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7	https://osv.dev/vulnerability/CVE-2025-21971
osv	https://security-tracker.debian.org/tracker/CVE-2025-21971	https://osv.dev/vulnerability/CVE-2025-21971

漏洞分析指导链接：
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息：

详情(点击展开)

影响的包	修复版本	修复补丁	问题引入补丁	来源
linux_kernel	6.1.132	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=066a3b5b2346febf9a655b444567b7138e3bb939	linuxkernelcves
linux_kernel	6.6.84	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=78533c4a29ac3aeddce4b481770beaaa4f3bfb67Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=066a3b5b2346febf9a655b444567b7138e3bb939	linuxkernelcves
linux_kernel	6.12.20	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=066a3b5b2346febf9a655b444567b7138e3bb939	linuxkernelcves
linux_kernel	6.13.8	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=94edfdfb9505ab608e86599d1d1e38c83816fc1cIssue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=066a3b5b2346febf9a655b444567b7138e3bb939	linuxkernelcves
linux_kernel	6.14	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0c3057a5a04d07120b3d0ec9c79568fceb9c921ePlease	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=066a3b5b2346febf9a655b444567b7138e3bb939	linuxkernelcves

二、漏洞分析结构反馈
影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.
openEuler评分：
5.5
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
受影响版本排查(受影响/不受影响)：
1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS(6.6.0):受影响
5.openEuler-24.03-LTS-SP1(6.6.0):受影响
6.openEuler-24.03-LTS-SP2(6.6.0):受影响
7.master(6.6.0):不受影响
8.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP3(5.10.0):否
3.master(6.6.0):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4(5.10.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否
8.openEuler-24.03-LTS-SP2(6.6.0):否

原因说明：
1.openEuler-24.03-LTS(6.6.0):正常修复
2.openEuler-24.03-LTS-SP1(6.6.0):正常修复
3.openEuler-24.03-LTS-SP2(6.6.0):正常修复
4.openEuler-20.03-LTS-SP4(4.19.90):不修复-超出修复范围
5.openEuler-22.03-LTS-SP3(5.10.0):不修复-超出修复范围
6.openEuler-22.03-LTS-SP4(5.10.0):不修复-超出修复范围
7.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发

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**issue处理注意事项:** 
**1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;**
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************************************************************************
影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响): 
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

原因说明：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

issue处理具体操作请参考: 
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2025-21971	None	None	https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67 https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7 https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7 https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e
https://ubuntu.com/security/CVE-2025-21971	None	None	https://discourse.ubuntu.com/c/project
https://www.opencve.io/cve/CVE-2025-21971	None	None	https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67 https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7 https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7 https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2025-21971
https://security-tracker.debian.org/tracker/CVE-2025-21971
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2025-21971

说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用CVE补丁工具。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

CVE-2025-21971

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

net_sched: Prevent creation of classes with TC_H_ROOT

The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination
condition when traversing up the qdisc tree to update parent backlog
counters. However, if a class is created with classid TC_H_ROOT, the
traversal terminates prematurely at this class instead of reaching the
actual root qdisc, causing parent statistics to be incorrectly maintained.
In case of DRR, this could lead to a crash as reported by Mingi Cho.

Prevent the creation of any Qdisc class with classid TC_H_ROOT
(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

The Linux kernel CVE team has assigned CVE-2025-21971 to this issue.

openEuler评分:(评分和向量)
3.9
AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

受影响版本排查(受影响/不受影响):
1.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4:不受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响

修复是否涉及abi变化(是/否)：
1.master(6.1.0):否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS-SP3:否
4.openEuler-22.03-LTS-SP4:否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-24.03-LTS-SP1:否

原因说明：
1.master(23.08.5):不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:不受影响-漏洞代码不能被攻击者触发
4.openEuler-22.03-LTS-SP3:不修复-超出修复范围
5.openEuler-22.03-LTS-SP4:不修复-超出修复范围
6.openEuler-24.03-LTS:正常修复
7.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-SP1:正常修复

@CTC-XiboWang 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 分析项目 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.The Linux kernel CVE team has assigned CVE-2025-21971 to this issue.|
|已分析|2.openEulerScore|3.9|
|已分析|3.openEulerVector|AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L|
|已分析|4.受影响版本排查|openEuler-22.03-LTS-SP3:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP1:受影响,master:不受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.是否涉及abi变化|master:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-24.03-LTS-SP1:否|
|已分析|6.原因说明|openEuler-24.03-LTS:正常修复,openEuler-24.03-LTS-SP1:正常修复,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-22.03-LTS-SP4:不修复-超出修复范围,master:不受影响-漏洞代码不能被攻击者触发,openEuler-20.03-LTS-SP4:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

CVE-2025-21971

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

net_sched: Prevent creation of classes with TC_H_ROOT

The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination
condition when traversing up the qdisc tree to update parent backlog
counters. However, if a class is created with classid TC_H_ROOT, the
traversal terminates prematurely at this class instead of reaching the
actual root qdisc, causing parent statistics to be incorrectly maintained.
In case of DRR, this could lead to a crash as reported by Mingi Cho.

Prevent the creation of any Qdisc class with classid TC_H_ROOT
(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

The Linux kernel CVE team has assigned CVE-2025-21971 to this issue.

openEuler评分:(评分和向量)
3.9
AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

受影响版本排查(受影响/不受影响):
1.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4:不受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响

修复是否涉及abi变化(是/否)：
1.master(6.1.0):否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS-SP3:否
4.openEuler-22.03-LTS-SP4:否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-24.03-LTS-SP1:否

原因说明：
1.master(23.08.5):不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:不受影响-漏洞代码不能被攻击者触发
4.openEuler-22.03-LTS-SP3:不修复-超出修复范围
5.openEuler-22.03-LTS-SP4:不修复-超出修复范围
6.openEuler-24.03-LTS:正常修复
7.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-SP1:正常修复

@CTC-XiboWang 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 分析项目 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.The Linux kernel CVE team has assigned CVE-2025-21971 to this issue.|
|已分析|2.openEulerScore|3.9|
|已分析|3.openEulerVector|AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L|
|已分析|4.受影响版本排查|openEuler-22.03-LTS-SP3:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP1:受影响,master:不受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.是否涉及abi变化|master:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-24.03-LTS-SP1:否|
|已分析|6.原因说明|openEuler-24.03-LTS:正常修复,openEuler-24.03-LTS-SP1:正常修复,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-22.03-LTS-SP4:不修复-超出修复范围,master:不受影响-漏洞代码不能被攻击者触发,openEuler-20.03-LTS-SP4:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

CVE-2025-21971

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

net_sched: Prevent creation of classes with TC_H_ROOT

The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination
condition when traversing up the qdisc tree to update parent backlog
counters. However, if a class is created with classid TC_H_ROOT, the
traversal terminates prematurely at this class instead of reaching the
actual root qdisc, causing parent statistics to be incorrectly maintained.
In case of DRR, this could lead to a crash as reported by Mingi Cho.

Prevent the creation of any Qdisc class with classid TC_H_ROOT
(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

openEuler评分:(评分和向量)
3.9
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP4:受影响
2.openEuler-22.03-LTS-SP3:受影响
3.openEuler-22.03-LTS-SP4:受影响
4.master(6.6.0):不受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响
8.openEuler-24.03-LTS-SP2:受影响

原因说明:
1.openEuler-20.03-LTS-SP4:不修复-超出修复范围
2.openEuler-22.03-LTS-SP3:不修复-超出修复范围
3.openEuler-22.03-LTS-SP4:不修复-超出修复范围
4.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS:正常修复
6.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1:正常修复
8.openEuler-24.03-LTS-SP2:正常修复

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP3:否
3.master(23.08.5):否
4.openEuler-24.03-LTS:否
5.openEuler-24.03-LTS-Next:否
6.openEuler-22.03-LTS-SP4:否
7.openEuler-24.03-LTS-SP1:否
8.openEuler-24.03-LTS-SP2:否

===========================================================

@CTC-XiboWang 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 分析项目 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.|
|已分析|2.openEulerScore|3.9|
|已分析|3.openEulerVector|AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L|
|已分析|4.受影响版本排查|openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-24.03-LTS-SP2:受影响,master:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.是否涉及abi变化|openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-SP1:否,openEuler-24.03-LTS-SP2:否|
|已分析|6.原因说明|openEuler-24.03-LTS:正常修复,openEuler-24.03-LTS-SP1:正常修复,openEuler-24.03-LTS-SP2:正常修复,openEuler-20.03-LTS-SP4:不修复-超出修复范围,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-22.03-LTS-SP4:不修复-超出修复范围,master:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

CVE-2025-21971

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

net_sched: Prevent creation of classes with TC_H_ROOT

The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination
condition when traversing up the qdisc tree to update parent backlog
counters. However, if a class is created with classid TC_H_ROOT, the
traversal terminates prematurely at this class instead of reaching the
actual root qdisc, causing parent statistics to be incorrectly maintained.
In case of DRR, this could lead to a crash as reported by Mingi Cho.

Prevent the creation of any Qdisc class with classid TC_H_ROOT
(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

openEuler评分:(评分和向量)
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP4:受影响
2.openEuler-22.03-LTS-SP3:受影响
3.openEuler-22.03-LTS-SP4:受影响
4.master(6.6.0):不受影响
5.openEuler-24.03-LTS:受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:受影响
8.openEuler-24.03-LTS-SP2:受影响

原因说明:
1.openEuler-20.03-LTS-SP4:不修复-超出修复范围
2.openEuler-22.03-LTS-SP3:不修复-超出修复范围
3.openEuler-22.03-LTS-SP4:不修复-超出修复范围
4.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS:正常修复
6.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1:正常修复
8.openEuler-24.03-LTS-SP2:正常修复

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP3:否
3.master(23.08.5):否
4.openEuler-24.03-LTS:否
5.openEuler-24.03-LTS-Next:否
6.openEuler-22.03-LTS-SP4:否
7.openEuler-24.03-LTS-SP1:否
8.openEuler-24.03-LTS-SP2:否

===========================================================

@CTC-XiboWang 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 分析项目 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:net_sched: Prevent creation of classes with TC_H_ROOTThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a terminationcondition when traversing up the qdisc tree to update parent backlogcounters. However, if a class is created with classid TC_H_ROOT, thetraversal terminates prematurely at this class instead of reaching theactual root qdisc, causing parent statistics to be incorrectly maintained.In case of DRR, this could lead to a crash as reported by Mingi Cho.Prevent the creation of any Qdisc class with classid TC_H_ROOT(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.|
|已分析|2.openEulerScore|5.5|
|已分析|3.openEulerVector|AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H|
|已分析|4.受影响版本排查|openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-22.03-LTS-SP4:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-24.03-LTS-SP2:受影响,master:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.是否涉及abi变化|openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-SP1:否,openEuler-24.03-LTS-SP2:否|
|已分析|6.原因说明|openEuler-24.03-LTS:正常修复,openEuler-24.03-LTS-SP1:正常修复,openEuler-24.03-LTS-SP2:正常修复,openEuler-20.03-LTS-SP4:不修复-超出修复范围,openEuler-22.03-LTS-SP3:不修复-超出修复范围,openEuler-22.03-LTS-SP4:不修复-超出修复范围,master:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

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