CVE-2022-50329 (GCVE-0-2022-50329)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:49 – Updated: 2026-08-05 08:58
VLAI
Title
block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
Summary
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().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a , < 1425f1bb5df5239021fd09ebc2a5e8070e705d36 (git)
Affected: 094f3d9314d67691cb21ba091c1b528f6e3c4893 , < 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f (git)
Affected: b22fd72bfebda3956efc4431b60ddfc0a51e03e0 , < cfe5b38c37720313eff0dec5517442c7ab3c9a20 (git)
Affected: 761564d93c8265f65543acf0a576b32d66bfa26a , < 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678 (git)
Affected: 64dc8c732f5c2b406cc752e6aaa1bd5471159cab , < 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02 (git)
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Linux Linux Affected: 5.15.86 , < 5.15.87 (semver)
Affected: 6.0.16 , < 6.0.17 (semver)
Affected: 6.1.2 , < 6.1.3 (semver)
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      "current_release_date": "2026-08-04T19:40:38+00:00",
      "cve": "CVE-2022-50329",
      "id": "CVE-2022-50329",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service due to use-after-free in BFQ scheduler",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50329.json",
      "version": "3"
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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