CVE-2021-45868 Information

Description

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.

CVSS Vector

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

Reference

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.3 https://www.openwall.com/lists/oss-security/2022/03/17/2 https://www.openwall.com/lists/oss-security/2022/03/17/1 https://bugzilla.kernel.org/show_bug.cgi?id=214655 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9bf3d20331295b1ecb81f4ed9ef358c51699a050 https://security.netapp.com/advisory/ntap-20220419-0003/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5