Out-of-bounds Read in Oisf Suricata
CVE-2026-57228
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Oisf Suricata — versions >= 7.0.13, < 7.0.17
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4 (Mitigation, Vendor Advisory)
- github.com/OISF/suricata/commit/19880f9d5bbe2b8f8e8867a577848dce2b532c86 (Patch)
- github.com/OISF/suricata/releases/tag/suricata-7.0.17 (Release Notes)
- redmine.openinfosecfoundation.org/issues/8608 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-57228?
- CVE-2026-57228 is a high-severity vulnerability in Oisf Suricata, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2026-09-18.
- How severe is CVE-2026-57228?
- High severity. CVSS v3 base score is 8.2 out of 10.