Use After Free Affecting kernel-devel package, versions *
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Test your applications- Snyk ID SNYK-RHEL7-KERNELDEVEL-7002931
- published 22 May 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2021-47342 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:7 kernel-devel.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-devel package and not the kernel-devel package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix possible UAF when remounting r/o a mmp-protected file system
After commit 618f003199c6 ("ext4: fix memory leak in ext4_fill_super"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over.
Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd().
Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>