Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.19, < 6.1.167 |
References
- https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570fPatch
- https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83Patch
- https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4Patch
- https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25cPatch
- https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1fPatch
- https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aaPatch
FAQ
What is CVE-2026-43366?
CVE-2026-43366 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 i...
How severe is CVE-2026-43366?
CVE-2026-43366 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43366?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.