9.1

CVE-2026-22264: oisf suricata Use After Free

CVSS: 9.1v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-22264DEBIAN-CVE-2026-22264
Published 27-01-2026Last modified 28-01-2026
Open JSON

Vulnerability summary

CVE-2026-22264 is a critical (CVSS 9.1) Use After Free vulnerability in oisf suricata. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.40%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:10082-1

Timeline

  1. 27-01-2026
    PublishedVulnerability first disclosed.
  2. 28-01-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.04 pp

From 0.36% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • suricata< 1:7.0.10-1+deb13u3 | < 1:8.0.3-1
Oisf1 product
Ubuntu1 product
  • suricataAll versions (No fix recorded)

3 vendors · 3 products

References

8 links