CVE-2026-31937

Suricata dcerpc: quadratic complexity in dcerpc buffering

7.5 HighFix available

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.36%Up 0.3 points since Apr 3, 2026

What each source reports

CVE List Score used 7.5

Suricata dcerpc: quadratic complexity in dcerpc buffering

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: CVE-2026-31937
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-407
Updated: 2026-11-02

EUVDEUVD-2026-18246 7.5

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: EUVD-2026-18246
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

NVD 7.5

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: CVE-2026-31937
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-407
Updated: 2026-11-02

OSVALPINE-CVE-2026-31937 7.5

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: ALPINE-CVE-2026-31937
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSV 7.5

Suricata dcerpc: quadratic complexity in dcerpc buffering

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: CVE-2026-31937
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-407
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-31937 7.5

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: DEBIAN-CVE-2026-31937
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-31937 7.5

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Record: UBUNTU-CVE-2026-31937
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2026:10443-1 No score

libsuricata8_0_4-8.0.4-1.1 on GA media

These are all security issues fixed in the libsuricata8_0_4-8.0.4-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:10443-1
Updated: 2026-11-02

Affected products

oisf suricata

Affected packages

Affected packages
Package	Affected	Fixed
`suricata` Alpine:v3.24	before 8.0.6-r0	8.0.6-r0
`suricata` Debian:13	before 1:7.0.10-1+deb13u4, plus listed versions 1:7.0.10-11:7.0.10-1+deb13u11:7.0.10-1+deb13u21:7.0.10-1+deb13u3	1:7.0.10-1+deb13u4
`suricata` Debian:14	before 1:8.0.1-1, plus listed versions 1:7.0.10-11:7.0.11-11:7.0.11-1~bpo13+11:8.0.0-1~exp11:8.0.0-1~exp21:8.0.0-1~exp41:8.0.0-1~exp5	1:8.0.1-1
`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 6 CVEs	before 8.0.4-1.1	8.0.4-1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

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

In short

CVE-2026-31937 is a high vulnerability (CVSS 7.5) in Oisf Suricata, published March 27, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. Fixed in suricata 8.0.6-r0.

References

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