Use-after-free in Linux kernel - CVE-2026-53248
Published: June 26, 2026
Vulnerability identifier: #VU135518
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-2026-53248
CWE-ID: CWE-416
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 use-after-free in airoha metadata dst teardown in the airoha network driver when processing received packets that retain a non-refcounted metadata_dst pointer. A local user can trigger teardown while stale skb dst references remain to cause a denial of service.
The issue arises because skb_dst_set_noref() requires RCU read-side protection and the destination object must remain valid until all RCU readers have completed.
How to mitigate CVE-2026-53248
Install security update from vendor's repository.