Vulnerability · Published Apr 10, 2025 · Assigned by GitHub_M

CVE-2025-29917Suricata decode_base64: signature can do large memory allocation

Medium 6.2

In plain English

A medium-severity resource allocation without limits 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 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.2Medium

Exploit odds (30 days)0.3%top 80.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. The bytes setting in the decode_base64 keyword is not properly limited. Due to this, signatures using the keyword and setting can cause large memory allocations of up to 4 GiB per thread. This vulnerability is fixed in 7.0.9.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	suricata	1:7.0.9-1	DEBIAN-CVE-2025-29917
Debian:14	suricata	1:7.0.9-1	DEBIAN-CVE-2025-29917
Ubuntu:22.04:LTS	suricata	no fix listed	UBUNTU-CVE-2025-29917
Ubuntu:24.04:LTS	suricata	no fix listed	UBUNTU-CVE-2025-29917
Ubuntu:25.10	suricata	no fix listed	UBUNTU-CVE-2025-29917
Ubuntu:26.04:LTS	suricata	no fix listed	UBUNTU-CVE-2025-29917
Ubuntu:26.10	suricata	no fix listed	UBUNTU-CVE-2025-29917

Affected products (as reported)

Vendor	Product	Versions
OISF	suricata	< 7.0.9

Weakness: CWE-770 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/OISF/suricata/security/advisories/GHSA-x8c9-8553-j9px x_refsource_CONFIRM
https://github.com/OISF/suricata/commit/32d0bd2bbb4d486623dec85a94952fde2515f2f0 x_refsource_MISC
https://redmine.openinfosecfoundation.org/issues/7613 x_refsource_MISC