CVE-2026-63986

In the Linux kernel, the following vulnerability has been resolved: ethtool: tsinfo: don't pass ERR_PTR to genlmsg_cancel on prepare failure The goto err label leads to: genlmsg_cancel(skb, ehdr); return ret; If ethnl_tsinfo_prepare_dump() failed, it has not started a genlmsg. There's nothing to cancel, and passing an error pointer to genlmsg_cancel() would cause a crash.

Package Linux Kernel
Published 2026-07-19
Last modified 2026-07-19
Patch available
Yes

Affected versions

Linux kernel versions 6.14 and later are affected. Fixed in 6.18.35, 7.0.12, 7.1 and their respective stable series.

Affected from
≥ 6.14
Fixed in
✓ 6.18.35 6.18.x ✓ 7.0.12 7.0.x ✓ 7.1

References

3 total

Frequently asked questions

  • What is CVE-2026-63986?

    CVE-2026-63986 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.14 onward and has been patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-63986 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-63986?

    Yes — CVE-2026-63986 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-63986 actively exploited?

    No — CVE-2026-63986 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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