Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M
CVE-2026-57228Suricata smtp/mime: heap out-of-bounds read quoted-printable decoder
High 8.2
In plain English
A high-severity out-of-bounds read in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | suricata | no fix listed | DEBIAN-CVE-2026-57228 |
| Debian:14 | suricata | 1:8.0.1-1 | DEBIAN-CVE-2026-57228 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-57228 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-57228 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
References
- https://github.com/OISF/suricata/security/advisories/GHSA-qxm4-q7vx-7xj4 x_refsource_CONFIRM
- https://github.com/OISF/suricata/commit/19880f9d5bbe2b8f8e8867a577848dce2b532c86 x_refsource_MISC
- https://github.com/OISF/suricata/releases/tag/suricata-7.0.17 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8608 x_refsource_MISC