CVE-2026-80669

Kernel panic via BPF LSM hook return

Published Aug 28, 2026 · Updated Aug 28, 2026

Denial of service in the Linux kernel allows local users to trigger a full kernel panic through a BPF LSM hook. The BPF LSM attachment path permits a program on xfrm_decode_session to return an error, while security_skb_classify_flow passes the nonzero result to BUG_ON. Exploitation requires privileged local access to load and attach a BPF LSM program; subsequent packet transmission panics the entire host.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to trigger a full kernel panic through a BPF LSM hook. The BPF LSM attachment path permits a program on xfrm_decode_session to return an error, while security_skb_classify_flow passes the nonzero result to BUG_ON. Exploitation requires privileged local access to load and attach a BPF LSM program; subsequent packet transmission panics the entire host.

The record

CVE
CVE-2026-80669
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.7
  2. Affected versionversion=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <12091470c6b4c1c14b2de12dcbae2ada6cb6d20b
  3. Affected versionversion=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <1bb3b6a5c3c5cc814eae4ff0212fdced36f8bce9
  4. Affected versionversion=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <49fa1be621dde8f526d36e5791aded8fafda1e9c
  5. Affected versionversion=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <4ae780d173ef40d4f7cb76935dc2d55fbf380009
  6. Affected versionversion=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <6b44c6660aa1c9b843e450a623ac4a8484919dce
  7. Affected versionversion=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <aa265d47308775c5501073b08133623bcb5421f9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <12091470c6b4c1c14b2de12dcbae2ada6cb6d20b; version=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <1bb3b6a5c3c5cc814eae4ff0212fdced36f8bce9; version=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <49fa1be621dde8f526d36e5791aded8fafda1e9c; version=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <4ae780d173ef40d4f7cb76935dc2d55fbf380009; version=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <6b44c6660aa1c9b843e450a623ac4a8484919dce; version=9e4e01dfd3254c7f04f24b7c6b29596bc12332f3 <aa265d47308775c5501073b08133623bcb5421f9

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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