CVE-2026-63986 Details
Description
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.
A vulnerability in the Linux kernel's handling of General Netlink messages in the Ethtool component can lead to a crash. This issue arises when the 'ethnl_tsinfo_prepare_dump' function fails to prepare a message for dumping timestamp information. The failure is not properly handled, allowing an error pointer to be passed to 'genlmsg_cancel', which is intended to cancel a message that has been started. Since the message preparation did not complete successfully, there is nothing to cancel, and this mismanagement can cause a crash.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. The specific commit that resolves this issue is 'c3fc9976f686f9a95baf87db9d387f218fd65394', which is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
No affected product data is available for this CVE.
Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 19, 2026 | New CVE Received | kernel.org |