What is CVE-2026-63889?

CVE-2026-63889 is a high-severity vulnerability in Linux. CVSS score: 8.1/10. Published 2026-07-19.

How severe is CVE-2026-63889?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Linux

CVE-2026-63889

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_transport_fc: Widen FPIN pname walker counter to u32 An adjacent Fibre Channel fabric actor that can deliver an FPIN ELS frame to an lpfc or qla2xxx Linux ini…

EPSS: 0.002 (9.6th 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:H/I:N/A:H.

Affected products

Linux — versions 3dcfe0de5a9752e646a61f4ce513ac059960c7c3, 5.11, 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

Frequently asked questions

What is CVE-2026-63889?: CVE-2026-63889 is a high-severity vulnerability in Linux. CVSS score: 8.1/10. Published 2026-07-19.
How severe is CVE-2026-63889?: High severity. CVSS v3 base score is 8.1 out of 10.