CVE-2022-49377

HIGH EPSS 19.0%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
19.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.12  –  <5.15.47
linuxlinux_kernel*≥5.16  –  <5.17.15
linuxlinux_kernel*≥5.18  –  <5.18.4

References 4

  • git.kernel.org https://git.kernel.org/stable/c/460aa288c5cd0544dcf933a2f0ad0e8c6d2d35ff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d05426e2d5fd7df8afc866b78c36b37b00188b7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70fdd922c7bf8949f8df109cf2635dff64c90392
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b140bac470b4f707cda59c7266214246238661df
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/460aa288c5cd0544dcf933a2f0ad0e8c6d2d35ff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d05426e2d5fd7df8afc866b78c36b37b00188b7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70fdd922c7bf8949f8df109cf2635dff64c90392
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b140bac470b4f707cda59c7266214246238661df
    Patch