Integer overflow in Linux kernel - CVE-2026-99118
Published: October 29, 2026
Vulnerability identifier: #VU158472
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99118
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to potentially cause a denial of service.
The vulnerability exists due to an unchecked integer overflow in the i915 DMC firmware parser when converting firmware payload sizes from dwords to bytes. A local privileged user can provide malformed DMC firmware containing a crafted size value to cause incorrect payload sizing, potentially leading to invalid memory accesses and a denial of service.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99118
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2