CVE-2026-31937: oisf suricata Inefficient Algorithmic Complexity
CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-31937DEBIAN-CVE-2026-31937
Published 02-04-2026Last modified 03-04-2026
Vulnerability summary
CVE-2026-31937 is a high (CVSS 7.5) Inefficient Algorithmic Complexity vulnerability in oisf suricata. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.3% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.47%
0%100%
Low · +0.12 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 02-04-2026PublishedVulnerability first disclosed.
- 03-04-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
39%
Versus all other CVEs
30-day change
+0.12 pp
From 0.35% on 21-09-2026
21-09-202621-10-2026
EPSS score0.47%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- suricata< 1:7.0.10-1+deb13u4 | < 1:8.0.1-1
Oisf1 product
- suricata< 7.0.15
Ubuntu1 product
- suricataAll versions (No fix recorded)
3 vendors · 3 products
