Integer overflow in Linux kernel - CVE-2026-80546
Published: August 27, 2026
Vulnerability identifier: #VU145946
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-2026-80546
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code or cause a denial of service.
The vulnerability exists due to integer overflow and missing minimum size validation in the xcrb_msg_to_type6cprb_msgx() function when copying and processing user-supplied CPRB data from userspace. A local user can provide a crafted control block and length values to execute arbitrary code or cause a denial of service.
The issue involves overflow conditions in aligned length and sum calculations, as well as insufficient validation before reading CPRBX structure fields from a userspace buffer.
Affected software
Linux kernel
How to mitigate CVE-2026-80546
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3