摘要:
In the Linux kernel, the following vulnerability has been resolved:
mptcp: sysctl: blackhole timeout: avoid using current->nsproxy
As mentioned in the previous commit, using the 'net' structure via
'current' is not recommended for different reasons:
- Inconsistency: getting info from the reader's/writer's netns vs only
from the opener's netns.
- current->nsproxy can be NULL in some cases, resulting in an 'Oops'
(null-ptr-deref), e.g. when the current task is exiting, as spotted by
syzbot [1] using acct(2).
The 'pernet' structure can be obtained from the table->data using
container_of().
安全等级: Low
公告ID: KylinSec-SA-2025-1085
发布日期: 2025年2月9日
关联CVE: CVE-2025-21641
In the Linux kernel, the following vulnerability has been resolved:
mptcp: sysctl: blackhole timeout: avoid using current->nsproxy
As mentioned in the previous commit, using the 'net' structure via
'current' is not recommended for different reasons:
- Inconsistency: getting info from the reader's/writer's netns vs only
from the opener's netns.
- current->nsproxy can be NULL in some cases, resulting in an 'Oops'
(null-ptr-deref), e.g. when the current task is exiting, as spotted by
syzbot [1] using acct(2).
The 'pernet' structure can be obtained from the table->data using
container_of().
| cve名称 | 产品 | 组件 | 是否受影响 |
|---|---|---|---|
| CVE-2025-21641 | KY3.4-5 | kernel | Unaffected |
| CVE-2025-21641 | V6 | kernel | Unaffected |
