CVE-2022-49377 (GCVE-0-2022-49377)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:11 – Updated: 2025-05-04 08:36
VLAI?
Title
blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx
Summary
In the Linux kernel, the following vulnerability has been resolved: blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx blk_mq_run_hw_queues() could be run when there isn't queued request and after queue is cleaned up, at that time tagset is freed, because tagset lifetime is covered by driver, and often freed after blk_cleanup_queue() returns. So don't touch ->tagset for figuring out current default hctx by the mapping built in request queue, so use-after-free on tagset can be avoided. Meantime this way should be fast than retrieving mapping from tagset.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b6e68ee82585f2ee890b0a897a6aacbf49a467bb , < 460aa288c5cd0544dcf933a2f0ad0e8c6d2d35ff (git)
Affected: b6e68ee82585f2ee890b0a897a6aacbf49a467bb , < b140bac470b4f707cda59c7266214246238661df (git)
Affected: b6e68ee82585f2ee890b0a897a6aacbf49a467bb , < 70fdd922c7bf8949f8df109cf2635dff64c90392 (git)
Affected: b6e68ee82585f2ee890b0a897a6aacbf49a467bb , < 5d05426e2d5fd7df8afc866b78c36b37b00188b7 (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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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