CVE-2026-43366
io_uring/kbuf: check if target buffer list is still legacy on recycle
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 8, 2026 |
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Affected Versions
Linux / Linux
c7fb19428d67dd0a2a78a4f237af01d39c78dc5a < a7b33671e418fca507feebd1d56e7f4952a4b25c c7fb19428d67dd0a2a78a4f237af01d39c78dc5a < 439a6728ec4641ffad1ca796622c19bc525e570f c7fb19428d67dd0a2a78a4f237af01d39c78dc5a < f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa c7fb19428d67dd0a2a78a4f237af01d39c78dc5a < 50ad880db3013c6fee0ef13781762a39e2e7ef83 c7fb19428d67dd0a2a78a4f237af01d39c78dc5a < 97b57f69fee1b61b41acbf37e7720cac9d389fa4 c7fb19428d67dd0a2a78a4f237af01d39c78dc5a < c2c185be5c85d37215397c8e8781abf0a69bec1f
Linux / Linux
5.19
References
git.kernel.org: https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c git.kernel.org: https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f git.kernel.org: https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa git.kernel.org: https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83 git.kernel.org: https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4 git.kernel.org: https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f