CVE-2025-64333 | Suricata is vulnerable to a stack overflow from big content-type

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, a large HTTP content type, when logged can cause a stack overflow crashing Suricata. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves limiting stream.reassembly.depth to less then half the stack size. Increasing the process stack size makes it less likely the bug will trigger.

Published: 2025-11-26 Last update: 2025-12-05 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-64333 is rated Low Risk (36.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.27%). 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-2025-64333

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 0.05% 0.27% +0.21%
2 2025-12-02 0.04% 0.05% +0.01%
3 2025-11-27 — 0.04% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-64333

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-2025-64333

OS Trackers for CVE-2025-64333

vendor priority summary link
alpine — CVE-2025-64333: 1 source package rows (suricata); 16 state rows across 3 repos (3.22-community, 3.23-community, edge-community); fixed 1, open 15. https://security.alpinelinux.org/vuln/CVE-2025-64333
debian not yet assigned CVE-2025-64333 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-2025-64333
redhat high — https://access.redhat.com/security/cve/CVE-2025-64333
ubuntu medium CVE-2025-64333 medium priority: Ubuntu including 1 source packages (suricata), 7 status rows across 7 suites (bionic, jammy, noble, plucky, questing, upstream, xenial): needs-triage 5, ignored 1, released 1. https://ubuntu.com/security/CVE-2025-64333

Affected software / configurations for CVE-2025-64333

Vendor Product Version Raw CPE
oisf suricata < 7.0.13 cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
oisf suricata >= 8.0.0, < 8.0.2 cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*

References for CVE-2025-64333

cvelogic Threat Intelligence