CVE-2025-21746

一、漏洞信息
漏洞编号：CVE-2025-21746
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：N/A None
Vector：CVSS：3.0/
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:Input: synaptics - fix crash when enabling pass-through portWhen enabling a pass-through port an interrupt might come before psmousedriver binds to the pass-through port. However synaptics sub-drivertries to access psmouse instance presumably associated with thepass-through port to figure out if only 1 byte of response or entireprotocol packet needs to be forwarded to the pass-through port and maycrash if psmouse instance has not been attached to the port yet.Fix the crash by introducing open() and close() methods for the port andcheck if the port is open before trying to access psmouse instance.Because psmouse calls serio_open() only after attaching psmouse instanceto serio port instance this prevents the potential crash.
漏洞公开时间：2025-02-27 11:15:15
漏洞创建时间：2025-02-27 13:02:59
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2025-21746

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/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3e179d3f1ada963475395d81bfe91daef4d1a24c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21746	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21746.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2025-21746	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://git.kernel.org/stable/c/3e179d3f1ada963475395d81bfe91daef4d1a24c	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://git.kernel.org/stable/c/a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c	https://bugzilla.suse.com/show_bug.cgi?id=1238498
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2348515	https://bugzilla.suse.com/show_bug.cgi?id=1238498

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	6.13.3	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=87da1ea93ec9f9f0004e5b12e78789bc94e360bfIssue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=100e16959c3ca8cb7be788ed3e2c5867481f35f6	linuxkernelcves
linux_kernel	6.14-rc1	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=08bd5b7c9a2401faabdaa1472d45c7de0755fd7ePlease	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=100e16959c3ca8cb7be788ed3e2c5867481f35f6	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:Input: synaptics - fix crash when enabling pass-through portWhen enabling a pass-through port an interrupt might come before psmousedriver binds to the pass-through port. However synaptics sub-drivertries to access psmouse instance presumably associated with thepass-through port to figure out if only 1 byte of response or entireprotocol packet needs to be forwarded to the pass-through port and maycrash if psmouse instance has not been attached to the port yet.Fix the crash by introducing open() and close() methods for the port andcheck if the port is open before trying to access psmouse instance.Because psmouse calls serio_open() only after attaching psmouse instanceto serio port instance this prevents the potential crash.
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-24.03-LTS(6.6.0):受影响
2.openEuler-24.03-LTS-SP1(6.6.0):受影响
3.openEuler-20.03-LTS-SP4(4.19.90):不受影响
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响
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.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

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.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
6.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
7.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1450

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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-2025-21746	None	None	https://git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf
https://ubuntu.com/security/CVE-2025-21746
https://www.opencve.io/cve/CVE-2025-21746	None	None	https://git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2025-21746
https://security-tracker.debian.org/tracker/CVE-2025-21746
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2025-21746

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-2025-21746

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

Input: synaptics - fix crash when enabling pass-through port

When enabling a pass-through port an interrupt might come before psmouse
driver binds to the pass-through port. However synaptics sub-driver
tries to access psmouse instance presumably associated with the
pass-through port to figure out if only 1 byte of response or entire
protocol packet needs to be forwarded to the pass-through port and may
crash if psmouse instance has not been attached to the port yet.

Fix the crash by introducing open() and close() methods for the port and
check if the port is open before trying to access psmouse instance.
Because psmouse calls serio_open() only after attaching psmouse instance
to serio port instance this prevents the potential crash.

The Linux kernel CVE team has assigned CVE-2025-21746 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:不受影响
4.openEuler-22.03-LTS-SP4: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

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-漏洞代码不存在
4.openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在
5.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在
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

@sanglipeng 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:Input: synaptics - fix crash when enabling pass-through portWhen enabling a pass-through port an interrupt might come before psmousedriver binds to the pass-through port. However synaptics sub-drivertries to access psmouse instance presumably associated with thepass-through port to figure out if only 1 byte of response or entireprotocol packet needs to be forwarded to the pass-through port and maycrash if psmouse instance has not been attached to the port yet.Fix the crash by introducing open() and close() methods for the port andcheck if the port is open before trying to access psmouse instance.Because psmouse calls serio_open() only after attaching psmouse instanceto serio port instance this prevents the potential crash.The Linux kernel CVE team has assigned CVE-2025-21746 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-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-22.03-LTS-SP3:不受影响,openEuler-22.03-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,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,openEuler-20.03-LTS-SP4:不受影响-漏洞代码不存在,openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在,openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在|

**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-2025-21746

影响性分析说明：
Reserved.

openEuler评分:(评分和向量)
5.5
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:不受影响
2.openEuler-22.03-LTS-SP3:不受影响
3.openEuler-22.03-LTS-SP4:不受影响
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

原因说明:
1.openEuler-20.03-LTS-SP4:不受影响-漏洞代码不存在
2.openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在
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

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

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

CVE-2025-21746

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

Input: synaptics - fix crash when enabling pass-through port

When enabling a pass-through port an interrupt might come before psmouse
driver binds to the pass-through port. However synaptics sub-driver
tries to access psmouse instance presumably associated with the
pass-through port to figure out if only 1 byte of response or entire
protocol packet needs to be forwarded to the pass-through port and may
crash if psmouse instance has not been attached to the port yet.

Fix the crash by introducing open() and close() methods for the port and
check if the port is open before trying to access psmouse instance.
Because psmouse calls serio_open() only after attaching psmouse instance
to serio port instance this prevents the potential crash.

openEuler评分:(评分和向量)
5.5
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:不受影响
2.openEuler-22.03-LTS-SP3:不受影响
3.openEuler-22.03-LTS-SP4:不受影响
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

原因说明:
1.openEuler-20.03-LTS-SP4:不受影响-漏洞代码不存在
2.openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在
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

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

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

@sanglipeng 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:Input: synaptics - fix crash when enabling pass-through portWhen enabling a pass-through port an interrupt might come before psmousedriver binds to the pass-through port. However synaptics sub-drivertries to access psmouse instance presumably associated with thepass-through port to figure out if only 1 byte of response or entireprotocol packet needs to be forwarded to the pass-through port and maycrash if psmouse instance has not been attached to the port yet.Fix the crash by introducing open() and close() methods for the port andcheck if the port is open before trying to access psmouse instance.Because psmouse calls serio_open() only after attaching psmouse instanceto serio port instance this prevents the potential crash.|
|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-24.03-LTS:受影响,openEuler-24.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-22.03-LTS-SP3:不受影响,openEuler-22.03-LTS-SP4:不受影响,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|
|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,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,openEuler-20.03-LTS-SP4:不受影响-漏洞代码不存在,openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在,openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在|

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