CVE-2023-52983

HIGH EPSS 17.5%
Published Mar 27, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bic_set_bfqq() After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), bic->bfqq will be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is called with the freed bic->bfqq. Fix the problem by always freeing bfqq after bic_set_bfqq().

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
17.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.15.86  –  <5.15.93
linuxlinux_kernel*≥6.1.2  –  <6.1.11
linuxlinux_kernel6.0.16any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/511c922c5bf6c8a166bea826e702336bc2424140
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7f77f3dab5066a7c9da73d72d1eee895ff84a8d5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b600de2d7d3a16f9007fad1bdae82a3951a26af2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cb1876fc33af26d00efdd473311f1b664c77c44e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/511c922c5bf6c8a166bea826e702336bc2424140
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7f77f3dab5066a7c9da73d72d1eee895ff84a8d5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b600de2d7d3a16f9007fad1bdae82a3951a26af2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cb1876fc33af26d00efdd473311f1b664c77c44e
    Patch