NULL pointer dereference in Linux kernel - CVE-2026-64187
Published: July 21, 2026
Vulnerability identifier: #VU138914
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64187
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in xlog_recover_reorder_trans in the XFS log recovery code when processing a crafted log during filesystem recovery. A local user can provide a crafted log item with no regions to trigger a kernel fault and cause a denial of service.
This issue only occurs for crafted log data during recovery, as the normal runtime commit path does not generate such a transaction.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-64187
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.96-1
linux (Debian package) - update to 6.12.96-1