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CVE-2026-99045 Linux CVE debrief

A vulnerability in the Linux kernel's ibmveth module has been addressed. The issue involves the h_free logical LAN on open-fail after register. The fix ensures that the logical LAN is properly deregistered in case of errors during the open process. This vulnerability affects Linux kernel developers and maintainers, as well as users of the ibmveth module. They should be aware of this vulnerability and apply the relevant patches to ensure the security and stability of their systems. The fix involves deregistering the logical LAN to prevent potential issues with the ibmveth module.

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-23
Original CVE updated
2026-10-30
Advisory published
2026-10-23
Advisory updated
2026-10-30

Who should care

Linux kernel developers and maintainers, as well as users of the ibmveth module, should be aware of this vulnerability and apply the relevant patches to ensure the security and stability of their systems.

Why it matters

The CVE-2026-99045 vulnerability in the Linux kernel's ibmveth module has been addressed through a series of commits. Defenders should verify that their Linux kernel versions are updated to include the fix to prevent potential issues with the ibmveth module.

  • Defenders should verify that their Linux kernel versions are updated to include the fix to prevent potential issues with the ibmveth module.
  • System administrators should review system logs for potential issues related to the ibmveth module.
  • Linux kernel developers and maintainers should be aware of this vulnerability and apply the relevant patches to ensure the security and stability of their systems.

Technical summary

The Linux kernel's ibmveth module has a vulnerability that has been addressed through a series of commits. The issue involves the h_free logical LAN on open-fail after register. The fix ensures that the logical LAN is properly deregistered in case of errors during the open process. This vulnerability affects the ibmveth module, and defenders should verify that their Linux kernel versions are updated to include the fix to prevent potential issues with the ibmveth module. The fix involves deregistering the logical LAN to prevent potential issues with the ibmveth module.

Defensive priority

Medium

Recommended defensive actions

  • Review and apply the relevant patches to the Linux kernel's ibmveth module.
  • Ensure that the Linux kernel is updated to a version that includes the fix.
  • Monitor system logs for potential issues related to the ibmveth module.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and associated source item provide details on the vulnerability and its fix. The Linux kernel's ibmveth module is affected, and the issue has been resolved through a series of commits. Defenders should verify that their Linux kernel versions are updated to include the fix to prevent potential issues with the ibmveth module. The fix ensures that the logical LAN is properly deregistered in case of errors during the open process. The CVE record was published on 2026-10-23T12:22:09.352Z and has not been modified since then.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-99045 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-99045

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-99045 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-99045

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • ibmveth: h_free logical LAN on open-fail after register

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/99xxx/CVE-2026-99045.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/073df7871a7023298ce27cfa518fbc30cc155651

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/7bd67d324d952101b3431c796d79f5e329bba159

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/eae138e880686ce19879aa0d158fa3c73516f632

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/decb4d4ead2c71ef698727734ab5024a872eb372

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/c54bbdf6f0731102a4bf7f5e4ee535b3ea415996

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/a065bd31ec462f6f9c267026b708dd020f122723

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/d24fdec1413c656d29298097926e77542785ca0c

    Supplemental source

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.