What is CVE-2026-31662?

CVE-2026-31662 is a high-severity vulnerability in Linux, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-04-24.

How severe is CVE-2026-31662?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Linux

CVE-2026-31662

In the Linux kernel, the following vulnerability has been resolved: tipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG The GRP_ACK_MSG handler in tipc_group_proto_rcv() currently decrements bc_ackers on every inbound group ACK, even…

EPSS: 0.004 (31.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 2f487712b89376fce267223bbb0db93d393d4b09, 4.15, 0
Linux Linux_kernel — versions 4.15, 7.0

Weakness classification (CWE)

CWE-191 — Integer Underflow

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-2026-31662?: CVE-2026-31662 is a high-severity vulnerability in Linux, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-04-24.
How severe is CVE-2026-31662?: High severity. CVSS v3 base score is 7.5 out of 10.