Out-of-bounds write in Linux kernel - CVE-2026-98248
Published: October 7, 2026
Vulnerability identifier: #VU153768
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98248
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to corrupt adjacent memory.
The vulnerability exists due to out-of-bounds reads and writes caused by an omitted instruction size suffix in the arm64 per-CPU atomic operations when performing 8-bit or 16-bit operations using LSE instructions. A local user can invoke the affected operations to corrupt adjacent memory.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98248
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1