DEBIAN-CVE-2021-47342
Record from OSV · Published May 21, 2024
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>
Fixed versions
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| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:14 | 5.14.6-1 |
| linux | Debian:13 | 5.14.6-1 |
| linux | Debian:12 | 5.14.6-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0 |
| Debian:13 | linux | 0 |
| Debian:12 | linux | 0 |
Timeline
- May 21, 2024 CVE Published
- Oct 23, 2026 CVE Updated
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