CVE-2026-43366

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 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-362

Published

2026-05-08

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

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

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