What is CVE-2026-63825?

CVE-2026-63825 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-07-19.

How severe is CVE-2026-63825?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Linux

CVE-2026-63825

In the Linux kernel, the following vulnerability has been resolved: gcov: use atomic counter updates to fix concurrent access crashes GCC's GCOV instrumentation can merge global branch counters with loop induction variables as an optimiz…

EPSS: 0.002 (6.3th 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 2521f2c228ad750701ba4702484e31d876dbc386, 6.18.38, 7.2-rc1

References

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

Frequently asked questions

What is CVE-2026-63825?: CVE-2026-63825 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-07-19.
How severe is CVE-2026-63825?: Critical severity. CVSS v3 base score is 9.8 out of 10.