bpf: Disable xfrm_decode_session hook attachment (CVE-2026-80669) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80669

bpf: Disable xfrm_decode_session hook attachment

Answer in brief

CVE-2026-80669 records a Unknown severity vulnerability in bpf: Disable xfrm_decode_session hook attachment. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Aug 28, 2026Source checked Aug 28, 2026First seen by HOL Aug 28, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <aa265d47308775c5501073b08133623bcb5421f9 \|\| >=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <6b44c6660aa1c9b843e450a623ac4a8484919dce \|\| >=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <4ae780d173ef40d4f7cb76935dc2d55fbf380009 \|\| >=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <49fa1be621dde8f526d36e5791aded8fafda1e9c \|\| >=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <1bb3b6a5c3c5cc814eae4ff0212fdced36f8bce9 \|\| >=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <12091470c6b4c1c14b2de12dcbae2ada6cb6d20b	aa265d47308775c5501073b08133623bcb5421f9, 6b44c6660aa1c9b843e450a623ac4a8484919dce, 4ae780d173ef40d4f7cb76935dc2d55fbf380009, 49fa1be621dde8f526d36e5791aded8fafda1e9c, 1bb3b6a5c3c5cc814eae4ff0212fdced36f8bce9, 12091470c6b4c1c14b2de12dcbae2ada6cb6d20b
Linux/Linuxgeneric	5.7	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to aa265d47308775c5501073b08133623bcb5421f9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.