SB2026062566 - Use-after-free in Linux kernel bpf

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Main Vulnerability Database SB2026062566

SB2026062566 - Use-after-free in Linux kernel bpf

Published: June 25, 2026

Security Bulletin ID SB2026062566
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-53094)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the BPF offload program pointer handling in kernel/bpf/core.c when destroying a network namespace after JIT compilation with constant blinding enabled for a dev-bound-only BPF program. A local user can trigger cleanup of a crafted dev-bound-only XDP program to cause a denial of service.

Exploitation requires net.core.bpf_jit_harden to be set to 2 or higher and affects dev-bound-only programs created with BPF_F_XDP_DEV_BOUND_ONLY.


Remediation

Install update from vendor's website.

References