CVE-2026-43366

HIGH EPSS 2.9%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: check if target buffer list is still legacy on recycle There's a gap between when the buffer was grabbed and when it potentially gets recycled, where if the list is empty, someone could've upgraded it to a ring provided type. This can happen if the request is forced via io-wq. The legacy recycling is missing checking if the buffer_list still exists, and if it's of the correct type. Add those checks.

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
2.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.19  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.78
linuxlinux_kernel*≥6.13  –  <6.18.19
linuxlinux_kernel*≥6.19  –  <6.19.9
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa
    Patch