CVE-2025-21846

一、漏洞信息
漏洞编号：CVE-2025-21846
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
CVSS V3.0分值：
BaseScore：5.5 Medium
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:acct: perform last write from workqueueIn [1] it was reported that the acct(2) system call can be used totrigger NULL deref in cases where it is set to write to a file thattriggers an internal lookup. This can e.g., happen when pointing acc(2)to /sys/power/resume. At the point the where the write to this filehappens the calling task has already exited and called exit_fs(). Alookup will thus trigger a NULL-deref when accessing current->fs.Reorganize the code so that the the final write happens from theworkqueue but with the caller s credentials. This preserves the(strange) permission model and has almost no regression risk.This api should stop to exist though.
漏洞公开时间：2025-03-12 18:15:16
漏洞创建时间：2025-03-12 18:31:47
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2025-21846

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/56d5f3eba3f5de0efdd556de4ef381e109b973a9
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5d5b936cfa4b0d5670ca7420ef165a074bc008eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b03782ae707cc45e65242c7cddd8e28f1c22cde5
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21846	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21846.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://git.kernel.org/stable/c/56d5f3eba3f5de0efdd556de4ef381e109b973a9	https://bugzilla.suse.com/show_bug.cgi?id=1239508
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2025-21846	https://bugzilla.suse.com/show_bug.cgi?id=1239508
redhat_bugzilla	https://lore.kernel.org/linux-cve-announce/2025031211-CVE-2025-21846-25c1@gregkh/T	https://bugzilla.redhat.com/show_bug.cgi?id=2351624
osv	https://git.kernel.org/stable/c/56d5f3eba3f5de0efdd556de4ef381e109b973a9	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/5d5b936cfa4b0d5670ca7420ef165a074bc008eb	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://git.kernel.org/stable/c/b03782ae707cc45e65242c7cddd8e28f1c22cde5	https://osv.dev/vulnerability/CVE-2025-21846
osv	https://security-tracker.debian.org/tracker/CVE-2025-21846	https://osv.dev/vulnerability/CVE-2025-21846

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
		https://git.kernel.org/stable/c/56d5f3eba3f5de0efdd556de4ef381e109b973a9		nvd
		https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7		nvd
		https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736		nvd
		https://git.kernel.org/stable/c/5d5b936cfa4b0d5670ca7420ef165a074bc008eb		nvd
		https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410		nvd
		https://git.kernel.org/stable/c/8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e		nvd
		https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84		nvd
		https://git.kernel.org/stable/c/b03782ae707cc45e65242c7cddd8e28f1c22cde5		nvd
linux_kernel	6.1.130	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5ee8da9bea70dda492d61f075658939af33d8410Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2	linuxkernelcves
linux_kernel	6.6.80	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5c928e14a2ccd99462f2351ead627b58075bb736Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2	linuxkernelcves
linux_kernel	6.12.17	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5a59ced8ffc71973d42c82484a719c8f6ac8f7f7Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2	linuxkernelcves
linux_kernel	6.13.5	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a8136afca090412a36429cb6c2543c714d9c0f84Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2	linuxkernelcves
linux_kernel	6.14-rc4	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=56d5f3eba3f5de0efdd556de4ef381e109b973a9Please	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2	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:acct: perform last write from workqueueIn [1] it was reported that the acct(2) system call can be used totrigger NULL deref in cases where it is set to write to a file thattriggers an internal lookup. This can e.g., happen when pointing acc(2)to /sys/power/resume. At the point the where the write to this filehappens the calling task has already exited and called exit_fs(). Alookup will thus trigger a NULL-deref when accessing current->fs.Reorganize the code so that the the final write happens from theworkqueue but with the caller s credentials. This preserves the(strange) permission model and has almost no regression risk.This api should stop to exist though.
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.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
1.master(6.6.0):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.openEuler-22.03-LTS-SP4(5.10.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-24.03-LTS-SP1(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-20.03-LTS-SP4(4.19.90):不修复-超出修复范围
4.openEuler-22.03-LTS-SP3(5.10.0):不修复-超出修复范围
5.openEuler-22.03-LTS-SP4(5.10.0):不修复-超出修复范围
6.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1372

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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;**
**2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;**
**3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否), 原因说明)不能省略,省略后cve-manager将无法正常解析填写内容.**
************************************************************************
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-2025-21846	None	None	https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736 https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7 https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410 https://git.kernel.org/stable/c/56d5f3eba3f5de0efdd556de4ef381e109b973a9 https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84
https://ubuntu.com/security/CVE-2025-21846
https://www.opencve.io/cve/CVE-2025-21846	None	None	https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736 https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7 https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410 https://git.kernel.org/stable/c/56d5f3eba3f5de0efdd556de4ef381e109b973a9 https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2025-21846
https://security-tracker.debian.org/tracker/CVE-2025-21846
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2025-21846

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-2025-21846

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

acct: perform last write from workqueue

In [1] it was reported that the acct(2) system call can be used to
trigger NULL deref in cases where it is set to write to a file that
triggers an internal lookup. This can e.g., happen when pointing acc(2)
to /sys/power/resume. At the point the where the write to this file
happens the calling task has already exited and called exit_fs(). A
lookup will thus trigger a NULL-deref when accessing current->fs.

Reorganize the code so that the the final write happens from the
workqueue but with the caller's credentials. This preserves the
(strange) permission model and has almost no regression risk.

This api should stop to exist though.

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.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4: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:不修复-超出修复范围
4.openEuler-22.03-LTS-SP3:正常修复
5.openEuler-22.03-LTS-SP4:正常修复
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:acct: perform last write from workqueueIn [1] it was reported that the acct(2) system call can be used totrigger NULL deref in cases where it is set to write to a file thattriggers an internal lookup. This can e.g., happen when pointing acc(2)to /sys/power/resume. At the point the where the write to this filehappens the calling task has already exited and called exit_fs(). Alookup will thus trigger a NULL-deref when accessing current->fs.Reorganize the code so that the the final write happens from theworkqueue but with the caller's credentials. This preserves the(strange) permission model and has almost no regression risk.This api should stop to exist though.|
|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,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|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-22.03-LTS-SP3:正常修复,openEuler-22.03-LTS-SP4:正常修复,openEuler-24.03-LTS:正常修复,openEuler-24.03-LTS-SP1:正常修复,openEuler-20.03-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-2025-21846

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

acct: perform last write from workqueue

In [1] it was reported that the acct(2) system call can be used to
trigger NULL deref in cases where it is set to write to a file that
triggers an internal lookup. This can e.g., happen when pointing acc(2)
to /sys/power/resume. At the point the where the write to this file
happens the calling task has already exited and called exit_fs(). A
lookup will thus trigger a NULL-deref when accessing current->fs.

Reorganize the code so that the the final write happens from the
workqueue but with the caller's credentials. This preserves the
(strange) permission model and has almost no regression risk.

This api should stop to exist though.

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.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4: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:不修复-超出修复范围
4.openEuler-22.03-LTS-SP3:正常修复
5.openEuler-22.03-LTS-SP4:正常修复
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:acct: perform last write from workqueueIn [1] it was reported that the acct(2) system call can be used totrigger NULL deref in cases where it is set to write to a file thattriggers an internal lookup. This can e.g., happen when pointing acc(2)to /sys/power/resume. At the point the where the write to this filehappens the calling task has already exited and called exit_fs(). Alookup will thus trigger a NULL-deref when accessing current->fs.Reorganize the code so that the the final write happens from theworkqueue but with the caller's credentials. This preserves the(strange) permission model and has almost no regression risk.This api should stop to exist though.|
|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,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|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-22.03-LTS-SP3:正常修复,openEuler-22.03-LTS-SP4:正常修复,openEuler-24.03-LTS:正常修复,openEuler-24.03-LTS-SP1:正常修复,openEuler-20.03-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-2025-21846

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

acct: perform last write from workqueue

In [1] it was reported that the acct(2) system call can be used to
trigger NULL deref in cases where it is set to write to a file that
triggers an internal lookup. This can e.g., happen when pointing acc(2)
to /sys/power/resume. At the point the where the write to this file
happens the calling task has already exited and called exit_fs(). A
lookup will thus trigger a NULL-deref when accessing current->fs.

Reorganize the code so that the the final write happens from the
workqueue but with the caller's credentials. This preserves the
(strange) permission model and has almost no regression risk.

This api should stop to exist though.

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.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4: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:不修复-超出修复范围
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:acct: perform last write from workqueueIn [1] it was reported that the acct(2) system call can be used totrigger NULL deref in cases where it is set to write to a file thattriggers an internal lookup. This can e.g., happen when pointing acc(2)to /sys/power/resume. At the point the where the write to this filehappens the calling task has already exited and called exit_fs(). Alookup will thus trigger a NULL-deref when accessing current->fs.Reorganize the code so that the the final write happens from theworkqueue but with the caller's credentials. This preserves the(strange) permission model and has almost no regression risk.This api should stop to exist though.|
|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,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|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-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-2025-21846

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

acct: perform last write from workqueue

In [1] it was reported that the acct(2) system call can be used to
trigger NULL deref in cases where it is set to write to a file that
triggers an internal lookup. This can e.g., happen when pointing acc(2)
to /sys/power/resume. At the point the where the write to this file
happens the calling task has already exited and called exit_fs(). A
lookup will thus trigger a NULL-deref when accessing current->fs.

Reorganize the code so that the the final write happens from the
workqueue but with the caller's credentials. This preserves the
(strange) permission model and has almost no regression risk.

This api should stop to exist though.

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.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4: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:不修复-超出修复范围
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

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CVE-2025-21846

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