Improper input validation in Linux kernel - CVE-2026-80545
Published: August 27, 2026
Vulnerability identifier: #VU145947
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80545
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to improper input validation in xcrb_msg_to_type6_ep11cprb_msgx() when copying and parsing user-supplied EP11 CPRB data from userspace. A local user can supply a specially crafted request to execute arbitrary code.
The issue involves missing minimum size validation, arithmetic overflow in aligned length calculations, and unsafe parsing of asn1-encoded payload data through a simple structure overlay.
Affected software
Linux kernel
How to mitigate CVE-2026-80545
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3