CVE-2026-68171Hinoki check available

Local security-policy bypass via stale syscall argument

Published Aug 10, 2026 · Updated Aug 10, 2026

Security policy bypass in the arm64 syscall path in Linux Kernel allows local users to evade seccomp checks through ptrace tracing. After a syscall-entry stop, ptrace can change x0 while pt_regs::orig_x0 retains the earlier first argument consumed by seccomp, audit, and tracepoints. Exploitation requires ptrace control of a native arm64 task; the security check can approve a different argument from the one the syscall executes.

CVSS severity7.0
High
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Security policy bypass in the arm64 syscall path in Linux Kernel allows local users to evade seccomp checks through ptrace tracing. After a syscall-entry stop, ptrace can change x0 while pt_regs::orig_x0 retains the earlier first argument consumed by seccomp, audit, and tracepoints. Exploitation requires ptrace control of a native arm64 task; the security check can approve a different argument from the one the syscall executes.

The record

CVE
CVE-2026-68171
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-807, T1562.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=4.8
  2. Affected versionversion=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <64ab0964c7db949abbd3c56268a220e2b77f7b9e
  3. Affected versionversion=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <8000a5f4d1d192f5bb3e4f29e7606a9460d376df
  4. Affected versionversion=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <b7afd2a80593dde3f4a68c9a9f73752f9c340e85
  5. Affected versionversion=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <e057b94772328221405b067c3a85fe479b915dc8
  6. Affected versionversion=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <e59c2476ef755221da31f4e26f6b89712ecf50f1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.8; version=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <64ab0964c7db949abbd3c56268a220e2b77f7b9e; version=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <8000a5f4d1d192f5bb3e4f29e7606a9460d376df; version=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <b7afd2a80593dde3f4a68c9a9f73752f9c340e85; version=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <e057b94772328221405b067c3a85fe479b915dc8; version=a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615 <e59c2476ef755221da31f4e26f6b89712ecf50f1

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-807Reliance on Untrusted Inputs in a Security Decision
T1562.001Impair Defenses: Disable or Modify Tools

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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