Vulnerability in Linux

CVE-2026-63978

In the Linux kernel, the following vulnerability has been resolved: net/handshake: Drain pending requests at net namespace exit The arguments to list_splice_init() in handshake_net_exit() are reversed. The call moves the local empty "req…

EPSS: 0.002 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Linux — versions 3b3009ea8abb713b022d94fba95ec270cf6e7eae, 6.4, 0

References

Frequently asked questions

What is CVE-2026-63978?
CVE-2026-63978 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-07-19.
How severe is CVE-2026-63978?
Critical severity. CVSS v3 base score is 9.8 out of 10.