What is CVE-2026-63830?

CVE-2026-63830 is a critical-severity vulnerability in Linux. CVSS score: 9.4/10. Published 2026-07-19.

How severe is CVE-2026-63830?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Vulnerability in Linux

CVE-2026-63830

In the Linux kernel, the following vulnerability has been resolved: net: skmsg: preserve sg.copy across SG transforms The sk_msg sg.copy bitmap is part of the scatterlist entry ownership state. A set bit tells sk_msg_compute_data_pointer…

EPSS: 0.002 (5.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

Affected products

Linux — versions d3b18ad31f93d0b6bae105c679018a1ba7daa9ca, 4.20, 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

Frequently asked questions

What is CVE-2026-63830?: CVE-2026-63830 is a critical-severity vulnerability in Linux. CVSS score: 9.4/10. Published 2026-07-19.
How severe is CVE-2026-63830?: Critical severity. CVSS v3 base score is 9.4 out of 10.