Out-of-bounds write in Linux kernel - CVE-2026-53014
Published: June 25, 2026
Vulnerability identifier: #VU135359
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-2026-53014
CWE-ID: CWE-787
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 memory corruption in tcf_blockcast_redir in net/sched/act_mirred.c when redirecting packets to multiple devices in a block with mixed device types. A local user can trigger packet redirection through such a block to cause a denial of service.
In the worst case, an incorrect mac_len can exhaust skb headroom and panic the kernel.
How to mitigate CVE-2026-53014
Install security update from vendor's repository.