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CVE-2022-50329
block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
High7.8EPSS 0.17%
- Published
- Updated
- Reserved
- Assigned by
- Linux
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a – < 1425f1bb5df5239021fd09ebc2a5e8070e705d36
- affected 094f3d9314d67691cb21ba091c1b528f6e3c4893 – < 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f
- affected b22fd72bfebda3956efc4431b60ddfc0a51e03e0 – < cfe5b38c37720313eff0dec5517442c7ab3c9a20
- affected 761564d93c8265f65543acf0a576b32d66bfa26a – < 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678
- affected 64dc8c732f5c2b406cc752e6aaa1bd5471159cab – < 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02
- affected 5.15.86 – < 5.15.87
- affected 6.0.16 – < 6.0.17
- affected 6.1.2 – < 6.1.3
References (5)
- https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36 (opens in a new tab)
- https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f (opens in a new tab)
- https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20 (opens in a new tab)
- https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678 (opens in a new tab)
- https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-50329)Record last updated .