Use-after-free vulnerability in Linux kernel's quota_tree.c

Use-after-free vulnerability in Linux kernel's quota_tree.c

CVE-2021-45868 · MEDIUM Severity

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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.

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