CVE-2021-47342

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: <[email protected]>

The following products are affected by CVE-2021-47342 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2021-47342.

URL	Resource
https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb
https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd
https://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b
https://lore.kernel.org/linux-cve-announce/2024052138-CVE-2021-47342-bfd5@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47342
https://www.cve.org/CVERecord?id=CVE-2021-47342