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Vulnerability · Published Jan 27, 2026 · Assigned by GitHub_M

CVE-2026-22264Suricata detect/alert: heap-use-after-free on alert queue expansion

High 7.4

In plain English

A high-severity use-after-free in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.4%top 64.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13suricata1:7.0.10-1+deb13u3DEBIAN-CVE-2026-22264
Debian:14suricata1:8.0.3-1DEBIAN-CVE-2026-22264
Ubuntu:22.04:LTSsuricatano fix listedUBUNTU-CVE-2026-22264
Ubuntu:24.04:LTSsuricatano fix listedUBUNTU-CVE-2026-22264
Ubuntu:25.10suricatano fix listedUBUNTU-CVE-2026-22264

Affected products (as reported)

VendorProductVersions
OISF suricata < 7.0.14>= 8.0.0, < 8.0.3

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

References