Bug 2492770 (CVE-2026-53268)

Summary: CVE-2026-53268 kernel: netfilter: conntrack_irc: fix possible out-of-bounds read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's netfilter conntrack_irc module. This vulnerability allows for a possible out-of-bounds read. When parsing network traffic, if a command string is matched but subsequent parsing fails, the system does not properly exit, leading to the flaw. This could potentially allow an attacker to cause a denial of service or disclose sensitive information.
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Description OSIDB Bzimport 2026-06-25 10:04:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack_irc: fix possible out-of-bounds read

When parsing fails after we've matched the command string we
should bail out instead of trying to match a different command.

This helper should be deprecated, given prevalence of TLS I doubt it has
any relevance in 2026.
Comment 1 Keith Grant 2026-06-25 23:46:45 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062517-CVE-2026-53268-9545@gregkh/T