CVE-2022-50329

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

State: Published
Severity: 7.8 High
Published: Sep 15, 2025
Updated: Oct 15, 2026
Reserved: Sep 15, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf.

Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a to before 1425f1bb5df5239021fd09ebc2a5e8070e705d36Affected 094f3d9314d67691cb21ba091c1b528f6e3c4893 to before 7949b0df3dd9f4817ed4a4e989fa9ee81df6205fAffected b22fd72bfebda3956efc4431b60ddfc0a51e03e0 to before cfe5b38c37720313eff0dec5517442c7ab3c9a20Affected 761564d93c8265f65543acf0a576b32d66bfa26a to before 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678Affected 64dc8c732f5c2b406cc752e6aaa1bd5471159cab to before 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02Affected
LinuxLinux	5.15.86 to before 5.15.87Affected 6.0.16 to before 6.0.17Affected 6.1.2 to before 6.1.3Affected

Product

Versions

LinuxLinux

5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a to before 1425f1bb5df5239021fd09ebc2a5e8070e705d36Affected
094f3d9314d67691cb21ba091c1b528f6e3c4893 to before 7949b0df3dd9f4817ed4a4e989fa9ee81df6205fAffected
b22fd72bfebda3956efc4431b60ddfc0a51e03e0 to before cfe5b38c37720313eff0dec5517442c7ab3c9a20Affected
761564d93c8265f65543acf0a576b32d66bfa26a to before 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678Affected
64dc8c732f5c2b406cc752e6aaa1bd5471159cab to before 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02Affected

LinuxLinux

5.15.86 to before 5.15.87Affected
6.0.16 to before 6.0.17Affected
6.1.2 to before 6.1.3Affected

References

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