Linux Kernel out-of-bounds read in netfilter conntrack_irc
CVE-2026-53268 Published on June 25, 2026
netfilter: conntrack_irc: fix possible out-of-bounds read
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.
Products Associated with CVE-2026-53268
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Affected Versions
Linux:- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 4cdda7f868f48e2f81579371584fdbdce37df2c8 is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 8a1d6e40dedfe1068aee094d851bd69e289c9fd6 is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 0afc802160af0df61ed374fdb97fb34cfe5cdf2f is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 7c34f91305292083253df6a9f6c8ede02d4ccaea is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below ddddd8271359961e403d11c90c9ba9fc38914f7e is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 9e5da2379f968a3ea5a6e38921ab6201576466dc is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 573810f61bcd6b6815e2ff53bbdd2b9c9d747176 is affected.
- Version 869f37d8e48f3911eb70f38a994feaa8f8380008 and below 66eba0ffce3b7e11449946b4cbbef8ea36112f56 is affected.
- Version 2.6.20 is affected.
- Before 2.6.20 is unaffected.
- Version 5.10.259, <= 5.10.* is unaffected.
- Version 5.15.210, <= 5.15.* is unaffected.
- Version 6.1.176, <= 6.1.* is unaffected.
- Version 6.6.143, <= 6.6.* is unaffected.
- Version 6.12.94, <= 6.12.* is unaffected.
- Version 6.18.36, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.