Release of invalid pointer or reference in Linux kernel - CVE-2026-80884
Published: September 5, 2026
Vulnerability identifier: #VU147032
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80884
CWE-ID: CWE-763
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger an invalid DMA memory release.
The vulnerability exists due to release of an invalid pointer in the NTB transport memory-window buffer cleanup routine when freeing coherent DMA memory after the DMA address has been modified. A local user can trigger cleanup of an NTB transport memory window to trigger an invalid DMA memory release.
Affected software
Linux kernel
How to mitigate CVE-2026-80884
Install security update from vendor's repository.