CVE-2022-50329

Advisory lineage Upstream: 0 Downstream: 9
Analyzed
Published: 15 Sept 2025, 14:49
Last modified:11 May 2026, 19:17

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

15 Sept 2025, 14:49
Published
Vulnerability first disclosed
11 May 2026, 19:17
Last Modified
Vulnerability information updated

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().

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a, < 1425f1bb5df5239021fd09ebc2a5e8070e705d36 | ≥ 094f3d9314d67691cb21ba091c1b528f6e3c4893, < 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f | ≥ b22fd72bfebda3956efc4431b60ddfc0a51e03e0, < cfe5b38c37720313eff0dec5517442c7ab3c9a20 | ≥ 761564d93c8265f65543acf0a576b32d66bfa26a, < 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678 | ≥ 64dc8c732f5c2b406cc752e6aaa1bd5471159cab, < 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02 | ≥ 5.15.86, < 5.15.87 | ≥ 6.0.16, < 6.0.17 | ≥ 6.1.2, < 6.1.3

  • linux•linux_kernel

    5.15.86 | 6.0.16 | 6.12 | 6.2:rc1

References (5)