Out-of-bounds read in Linux kernel - CVE-2026-80827
Published: September 5, 2026
Vulnerability identifier: #VU147094
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80827
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to read memory out of bounds.
The vulnerability exists due to improper length validation in the option_instat_callback interrupt URB callback when processing a short interrupt IN packet from a USB device. An attacker with physical access can provide a USB device that sends a crafted short interrupt IN packet to read memory out of bounds.
Affected software
Linux kernel
How to mitigate CVE-2026-80827
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/030e3a73d3c3aa67c44454649e984d6383cdb7d3
- https://git.kernel.org/stable/c/060db7d48af1e650643c8b8319111a9ea2ce4486
- https://git.kernel.org/stable/c/2ef5560387f2c0713cee975be2b24b281bd90f3e
- https://git.kernel.org/stable/c/6b8cf5422c7e96ed5b22a8368eff663f3f98b8ec
- https://git.kernel.org/stable/c/885d802f544ca7bfa8f3984d94233cce715bb6b3
- https://git.kernel.org/stable/c/94e5525697b9e91ddc4071129874120a50a4f342
- https://git.kernel.org/stable/c/a72a13c83a652516a0e469d275b81d29a7429049
- https://git.kernel.org/stable/c/d762aef4eba354066be21a5d88eb2066e282f4c9
- https://git.kernel.org/stable/c/fbe60fd2abc8a5561f39719a41ad9a01b5d8e567