CVE-2026-63986

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.