What is CVE-2026-43080?

CVE-2026-43080 is a medium-severity vulnerability in Linux, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2026-05-06.

How severe is CVE-2026-43080?

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

Vulnerability in Linux

CVE-2026-43080

In the Linux kernel, the following vulnerability has been resolved: l2tp: Drop large packets with UDP encap syzbot reported a WARN on my patch series [1]. The actual issue is an overflow of 16-bit UDP length field, and it exists in the u…

EPSS: 0.000 (2.4th 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 5.15.209, 7.0, 6.1.175
Linux Linux_kernel — versions 7.0

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

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

Frequently asked questions

What is CVE-2026-43080?: CVE-2026-43080 is a medium-severity vulnerability in Linux, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2026-05-06.
How severe is CVE-2026-43080?: Medium severity. CVSS v3 base score is 5.5 out of 10.