CVE-2026-57228: oisf suricata Out-of-bounds Read
Vulnerability summary
CVE-2026-57228 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in oisf suricata. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35.4% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 18-09-2026PublishedVulnerability first disclosed.
- 21-09-2026Last modifiedVulnerability information updated.
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 7.0.13 until 7.0.17, the SMTP MIME quoted-printable decoder in src/util-decode-mime.c can read one byte past a heap buffer when a quoted-printable escape sequence is split across traffic chunks and the following chunk contains exactly one byte. Crafted SMTP traffic can trigger the out-of-bounds read and crash Suricata when decode-quoted-printable MIME decoding is enabled. This issue is fixed in version 7.0.17.
CVSS metrics
4 scores · 4 sources · 1 version- CVE.orgCNA8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
-0.14 pp
From 0.56% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (redmine.openinfosecfoundation.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- suricataAll versions (No fix recorded) | < 1:8.0.1-1
Oisf1 product
- suricata≥ 7.0.13, < 7.0.17
Ubuntu1 product
- suricataAll versions (No fix recorded)
3 vendors · 3 products
References
7 links- github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4X Refsource CONFIRMREPORTMitigationVendor Advisory
