linux: In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk)
CVE-2021-45868 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-45868, released March 18, 2022. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk). This can, for example, lead to a kernel/locking/rwsem.c use-after-free if there is a corrupted quota file.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.15.3-1 | DEBIAN-CVE-2021-45868 | Mar 18, 2022 |
| linux · Debian 13.5 (trixie) | 5.15.3-1 | DEBIAN-CVE-2021-45868 | Mar 18, 2022 |
| linux · Debian 14 | 5.15.3-1 | DEBIAN-CVE-2021-45868 | Mar 18, 2022 |
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