SB2026090563 - Release of invalid pointer or reference in Linux kernel ntb driver
Published: September 5, 2026
Security Bulletin ID
SB2026090563
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Release of invalid pointer or reference (CVE-ID: CVE-2026-80884)
CWE-ID: CWE-763 - Release of invalid pointer or reference
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.