Out-of-bounds write in Linux kernel - CVE-2026-80582
Published: August 27, 2026
Vulnerability identifier: #VU145908
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-2026-80582
CWE-ID: CWE-787
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 an out-of-bounds mapping condition in the drm shmem helper huge page fault handler when installing PMD huge page mappings. A local user can trigger a huge page fault with an address range that exceeds the boundaries of the VMA to execute arbitrary code.
The issue can lead to a VM_BUG_ON_VMA() condition if the resulting mapping reaches copy_pmd_range().
Affected software
Linux kernel
How to mitigate CVE-2026-80582
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3