What’s Vulnerable › Vulnerabilities

CVE-2023-39197: Kernel: dccp: conntrack out-of-bounds read in nf_conntrack_dccp_packet()

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-23 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read vulnerability was found in Netfilter Connection Tracking (conntrack) in the Linux kernel. This flaw allows a remote user to disclose sensitive information via the DCCP protocol.

Affected products

• Fedoraproject Fedora: 38
• Linux kernel: from 2.6.26 before 5.4.251; from 5.5 before 5.10.188; from 5.11 before 5.15.121; from 5.16 before 6.1.39; from 6.2 before 6.3.13; from 6.4 before 6.4.4 — fixed in 5.10.188, 5.15.121, 5.4.251, 6.1.39, 6.3.13, 6.4.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.188, 5.15.121, 5.4.251, 6.1.39. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-39197
• https://bugzilla.redhat.com/show_bug.cgi?id=2218342
• https://access.redhat.com/security/cve/CVE-2023-39197
• https://bugzilla.redhat.com/show_bug.cgi?id=2218342

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