CVE-2023-52895

MEDIUM EPSS 10.6%
Published Aug 21, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 21, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/poll: don't reissue in case of poll race on multishot request A previous commit fixed a poll race that can occur, but it's only applicable for multishot requests. For a multishot request, we can safely ignore a spurious wakeup, as we never leave the waitqueue to begin with. A blunt reissue of a multishot armed request can cause us to leak a buffer, if they are ring provided. While this seems like a bug in itself, it's not really defined behavior to reissue a multishot request directly. It's less efficient to do so as well, and not required to rearm anything like it is for singleshot poll requests.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
10.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 1

VendorProductVersionRange
linuxlinux_kernel6.1.7any

References 2

  • git.kernel.org https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13
    Patch