What is CVE-2026-31668?

CVE-2026-31668 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-04-24.

How severe is CVE-2026-31668?

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

Vulnerability in Linux

CVE-2026-31668

In the Linux kernel, the following vulnerability has been resolved: seg6: separate dst_cache for input and output paths in seg6 lwtunnel The seg6 lwtunnel uses a single dst_cache per encap route, shared between seg6_input_core() and seg6…

EPSS: 0.004 (35.9th 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 6c8702c60b88651072460f3f4026c7dfe2521d12, 4.10, 0
Linux Linux_kernel — versions 4.10, 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)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-31668?: CVE-2026-31668 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2026-04-24.
How severe is CVE-2026-31668?: Critical severity. CVSS v3 base score is 9.8 out of 10.