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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.