Vulnerability in Linux

CVE-2026-63925

In the Linux kernel, the following vulnerability has been resolved: macsec: fix replay protection at XPN lower-PN wrap In macsec_post_decrypt(), when pn is U32_MAX, pn + 1 overflows u32 to 0 and the first branch never fires. If next_pn_h…

EPSS: 0.002 (11.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

  • Linux — versions a21ecf0e033807b976967286e6c392f48ee2049f, 5.7, 0

References

Frequently asked questions

What is CVE-2026-63925?
CVE-2026-63925 is a high-severity vulnerability in Linux. CVSS score: 8.1/10. Published 2026-07-19.
How severe is CVE-2026-63925?
High severity. CVSS v3 base score is 8.1 out of 10.