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THREAT OPS › Threat News › [NVD] CVE-2026-31681 (MEDIUM 5.5) — In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_multiport: validate range encoding in checkentry ports_match_v1() treats any non-zero pflags entry as the start of a port range and unconditionally consumes the next ports[] element as the range e

[NVD] CVE-2026-31681 (MEDIUM 5.5) — In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_multiport: validate range encoding in checkentry ports_match_v1() treats any non-zero pflags entry as the start of a port range and unconditionally consumes the next ports[] element as the range e

lownvdPublished 2026-04-25

CVE-2026-31681 CVSS: 5.5 MEDIUM Published: 2026-04-25T09:16:01.800

In the Linux kernel, the following vulnerability has been resolved:

netfilter: xt_multiport: validate range encoding in checkentry

ports_match_v1() treats any non-zero pflags entry as the start of a port range and unconditionally consumes the next ports[] element as the range end.

The checkentry path currently validates protoco

Indicators of compromise

CVE-2026-31681cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-31681