CVE-2026-92485

Kernel warning via corrupted BPF trampoline flags

Published Sep 17, 2026 · Updated Sep 18, 2026

State corruption in BPF trampoline code in affected Linux kernel releases allows privileged local users to trigger a kernel warning. Verifier code assigns BPF_TRAMP_F_TAIL_CALL_CTX to tr->flags instead of preserving existing flags, dropping BPF_TRAMP_F_CALL_ORIG needed to restore the patched instruction. The sequence requires two fexit programs targeting the same tail-call-reachable BPF program and closure of the first link; published evidence shows a warning, not privilege gain or data exposure.

CVSS severity2.3
Low
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

State corruption in BPF trampoline code in affected Linux kernel releases allows privileged local users to trigger a kernel warning. Verifier code assigns BPF_TRAMP_F_TAIL_CALL_CTX to tr->flags instead of preserving existing flags, dropping BPF_TRAMP_F_CALL_ORIG needed to restore the patched instruction. The sequence requires two fexit programs targeting the same tail-call-reachable BPF program and closure of the first link; published evidence shows a warning, not privilege gain or data exposure.

The record

CVE
CVE-2026-92485
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=028480eaf2a1401e914a1fa1a4a21d877cf0ae30
  2. Affected versionversion=2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 <48a0209d8da0d90a7b0a0db19d1ff88027b13781
  3. Affected versionversion=2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 <61aaa8782bec59ecffd22e030f54ef9351bcabf9
  4. Affected versionversion=605c8d8f9966fcd2f0b858fabebe416fc83f2209
  5. Affected versionversion=6.1.72 <6.2
  6. Affected versionversion=6.5.12 <6.6
  7. Affected versionversion=6.6.2 <6.7
  8. Affected versionversion=6.7
  9. Affected versionversion=8f873cc3f67f2257493063e57d0caf07ef889ee9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=028480eaf2a1401e914a1fa1a4a21d877cf0ae30; version=2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 <48a0209d8da0d90a7b0a0db19d1ff88027b13781; version=2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 <61aaa8782bec59ecffd22e030f54ef9351bcabf9; version=605c8d8f9966fcd2f0b858fabebe416fc83f2209; version=6.1.72 <6.2; version=6.5.12 <6.6; version=6.6.2 <6.7; version=6.7; version=8f873cc3f67f2257493063e57d0caf07ef889ee9

Published CVSS scores

2.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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