What’s Vulnerable › Vulnerabilities

CVE-2026-80669: bpf: Disable xfrm_decode_session hook attachment

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-08-28

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable xfrm_decode_session hook attachment BPF LSM programs can currently attach to xfrm_decode_session(). That hook may return an error, but security_skb_classify_flow() calls it from a void path and triggers BUG_ON() if an error is returned. Disable BPF attachment to the hook to prevent a BPF LSM program from turning packet classification into a full panic.

Affected products

• Linux kernel: 5.7 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/12091470c6b4c1c14b2de12dcbae2ada6cb6d20b
• https://git.kernel.org/stable/c/1bb3b6a5c3c5cc814eae4ff0212fdced36f8bce9
• https://git.kernel.org/stable/c/49fa1be621dde8f526d36e5791aded8fafda1e9c
• https://git.kernel.org/stable/c/4ae780d173ef40d4f7cb76935dc2d55fbf380009
• https://git.kernel.org/stable/c/6b44c6660aa1c9b843e450a623ac4a8484919dce
• https://git.kernel.org/stable/c/aa265d47308775c5501073b08133623bcb5421f9

Get alerted when CVE-2026-80669 or the next vulnerability affects your stack