What is CVE-2026-63913?

CVE-2026-63913 is a high-severity vulnerability in Linux. CVSS score: 8.2/10. Published 2026-07-19.

How severe is CVE-2026-63913?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Linux

CVE-2026-63913

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: tcp: do not force CLOSE on invalid-seq RST without direction check An unintended behavior in the TCP conntrack state machine allows a connection to…

EPSS: 0.002 (13.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Linux — versions 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1, 2.6.15, 0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2026-63913?: CVE-2026-63913 is a high-severity vulnerability in Linux. CVSS score: 8.2/10. Published 2026-07-19.
How severe is CVE-2026-63913?: High severity. CVSS v3 base score is 8.2 out of 10.