7.8

CVE-2022-50329: block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Modified
AliasesUBUNTU-CVE-2022-50329DEBIAN-CVE-2022-50329
Published 15-09-2025Last modified 15-10-2026

Vulnerability summary

CVE-2022-50329 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 6
RHSA-2023:6583SUSE-SU-2025:03615-1SUSE-SU-2025:03628-1SUSE-SU-2025:3716-1SUSE-SU-2025:3761-1SUSE-SU-2026:0475-1

Timeline

  1. 15-09-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability 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

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu84 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • 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_kernelEOL5.15.86 | 6.0.16 | 6.12 | 6.2:rc1
Debian1 product
  • linux< 6.1.4-1

3 vendors · 87 products

References

9 links