ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-89603

REJECTED: CVE-2026-89603: entry: Fix seccomp bypass after ptrace with TSYNC

Published Sep 11, 2026 · catalog updated Oct 16, 2026 · Linux Linux Kernel

Open the advisory

Exploitation likelihood is not on this record for CVE-2026-89603. A missing EPSS score is not a low risk. Compare Linux Linux Kernel with the linked advisory before you change production.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Not in the current FIRST EPSS dataset
Remediation
Not established
Affected products
linux kernel

CVE-2026-89603 has now been rejected and is no longer a valid CVE.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • linux kernelversion unspecified

How to fix CVE-2026-89603

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2026-89603. A missing EPSS score is not a low risk. Compare Linux Linux Kernel with the linked advisory before you change production.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is absent from the current FIRST dataset. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 11, 2026 · NIST NVD

    Detected

  2. Oct 16, 2026 · NIST NVD

    Rejected

    NVD rejected this CVE record.

  3. Oct 16, 2026 · NIST NVD

    Updated

    The description or metadata changed.

Sources

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.