Every CVE Search/ Get API key

CVE-2025-29917

Suricata decode_base64: signature can do large memory allocation

6.2 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.27%Up 0.3 points since Apr 11, 2025
90%50%10%1%

What each source reports

CVE List Score used 6.2

Suricata decode_base64: signature can do large memory allocation

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.

Record
CVE-2025-29917
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
EUVDEUVD-2025-10710 6.2

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.

Record
EUVD-2025-10710
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
NVD 6.2

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.

Record
CVE-2025-29917
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSV 6.2

Suricata decode_base64: signature can do large memory allocation

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.

Record
CVE-2025-29917
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSVDEBIAN-CVE-2025-29917 5.5

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.

Record
DEBIAN-CVE-2025-29917
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2025-29917 6.2

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.

Record
UBUNTU-CVE-2025-29917
CVSS 3.1
6.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2026-0181 No score

Updated suricata packages fix security vulnerabilities

Various security, performance, accuracy, and stability issues have been fixed, plus we have moved to a supported version.

Record
MGASA-2026-0181
Updated
2026-11-02
OSVopenSUSE-SU-2025:15394-1 No score

libsuricata8_0_0-8.0.0-1.1 on GA media

These are all security issues fixed in the libsuricata8_0_0-8.0.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15394-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
suricata
Debian:13
 before 1:7.0.9-1
1:7.0.9-1
suricata
Debian:14
 before 1:7.0.9-1
1:7.0.9-1
suricata
Mageia:9
From an advisory covering 14 CVEs
 before 7.0.10-1.mga9
7.0.10-1.mga9
suricata
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.0.8-1build12.0.9-12.0.10-12.0.10-22.0.11-13.0-1
 None known
suricata
Ubuntu:18.04:LTS
 All versions, plus listed versions
3.2-2ubuntu3
 None known
suricata
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:6.0.4-21:6.0.4-3
 None known
suricata
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:7.0.0-21:7.0.2-11:7.0.2-1build11:7.0.3-1build11:7.0.3-1build3
 None known
suricata
Ubuntu:25.10
 All versions, plus listed versions
1:7.0.8-21:7.0.10-1
 None known
suricata
Ubuntu:26.10
 All versions, plus listed versions
1:8.0.3-11:8.0.5-11:8.0.6-1
 None known
suricata
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:7.0.10-11:8.0.1-3build11:8.0.2-11:8.0.2-1build11:8.0.3-1
 None known
suricata
openSUSE:Tumbleweed
From an advisory covering 30 CVEs
 before 8.0.0-1.1
8.0.0-1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-29917 is a medium vulnerability (CVSS 6.2) in Oisf Suricata, published April 10, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in suricata 1:7.0.9-1.

References

Show 40 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open