CVE-2026-31937 | 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.

Published: 2026-04-02 Last update: 2026-04-07 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-31937 is rated Low Risk (39.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.35%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-31937

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.35% +0.33%
2 2026-05-22 0.05% 0.02% -0.03%
3 2026-04-08 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-31937

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2026-31937

OS Trackers for CVE-2026-31937

vendor priority summary link
alpine — CVE-2026-31937: 1 source package rows (suricata); 7 state rows across 1 repos (edge-community); fixed 0, open 7. https://security.alpinelinux.org/vuln/CVE-2026-31937
debian not yet assigned CVE-2026-31937 not yet assigned priority: Debian including 1 source packages (suricata), 4 status rows across 4 suites (bullseye, forky, sid, trixie): resolved 3, open 1. https://security-tracker.debian.org/tracker/CVE-2026-31937
redhat high — https://access.redhat.com/security/cve/CVE-2026-31937
ubuntu medium CVE-2026-31937 medium priority: Ubuntu including 1 source packages (suricata), 6 status rows across 6 suites (bionic, jammy, noble, questing, upstream, xenial): needs-triage 6. https://ubuntu.com/security/CVE-2026-31937

Affected software / configurations for CVE-2026-31937

Vendor Product Version Raw CPE
oisf suricata < 7.0.15 cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*

References for CVE-2026-31937

cvelogic Threat Intelligence