CVE-2021-47342
Published: May 21, 2024
Modified: May 23, 2026
Description
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]>
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 5e4f5138bd8522ebe231a137682d3857209a2c07 - < b663890d854403e566169f7e90aed5cd6ff64f6baffected eb7b40d9d3785f7a131fb0b1f89bb6efa46c1833 - < 7ed572cdf11081f8f9e07abd4bea56a3f2c4edbdaffected 618f003199c6188e01472b03cdbba227f1dc5f24 - < 61bb4a1c417e5b95d9edb4f887f131de32e419cbaffected cecfdb9cf9a700d1037066173abac0617f6788dfaffected 5.12.18 - < 5.13 |
Linux | Linux | affected 5.10.51 - < 5.10.77 |
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