NULL pointer dereference in Linux kernel - CVE-2026-53338
Published: July 2, 2026
Vulnerability identifier: #VU136711
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-2026-53338
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 attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in airoha_qdma_init_hfwd_queues() when processing a missing reserved memory region referenced by the "memory-region" phandle. A local attacker can trigger the vulnerable code path to cause a denial of service.
The issue can occur when the referenced reserved memory entry is absent from the reserved memory table, such as with a misconfigured device tree.
How to mitigate CVE-2026-53338
Install security update from vendor's repository.