NULL pointer dereference in Linux kernel - CVE-2026-53177
Published: June 26, 2026
Vulnerability identifier: #VU135602
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-53177
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the bnxt_io_error_detected error recovery path when handling PCIe error recovery on a closed NIC. A local user can trigger PCIe error recovery for a device whose bnapi state is not allocated to cause a denial of service.
The issue occurs because error recovery services may run on subordinate devices regardless of administrative state.
How to mitigate CVE-2026-53177
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7
- https://git.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320
- https://git.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7
- https://git.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474
- https://git.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761
- https://git.kernel.org/stable/c/964b1c3eb71afe58bb61c8b984164447e000ae8a
- https://git.kernel.org/stable/c/d930276f2cddd0b7294cac7a8fe7b877f6d9e08d