What is CVE-2026-31503?

CVE-2026-31503 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-04-22.

How severe is CVE-2026-31503?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Linux

CVE-2026-31503

In the Linux kernel, the following vulnerability has been resolved: udp: Fix wildcard bind conflict check when using hash2 When binding a udp_sock to a local address and port, UDP uses two hashes (udptable->hash and udptable->hash2) for…

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 30fff9231fad757c061285e347b33c5149c2c2e4, 2.6.33, 0
Linux Linux_kernel — versions 2.6.33, 7.0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-31503?: CVE-2026-31503 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-04-22.
How severe is CVE-2026-31503?: Medium severity. CVSS v3 base score is 5.5 out of 10.