CVE-2026-22264
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 0.36% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- oisf/suricata
- Source
- security-advisories@github.com
References
- https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715Patch
- https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2Patch
- https://github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209bPatch
- https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5Vendor Advisory
- https://redmine.openinfosecfoundation.org/issues/8190Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.