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Vulnerabilities CVE-2026-43366

CVE-2026-43366

High
Open
TLP:CLEAR

io_uring/kbuf: check if target buffer list is still legacy on recycle

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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.

Details

CVSS Score
7.8
EPSS Score
0.13%

3th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
May 8, 2026
Last Modified
Aug 5, 2026
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