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CVE-2026-43366

Last refreshed2026-10-17

Status: UPDATED  |  Advisory ID: CVE-2026-43366

Key Details

CVECVE-2026-43366
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-16
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Linux Kernel

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

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. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-43366
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-43366

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