CVE-2026-53268

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

State: Published
Severity: 8.2 High
Published: Jun 25, 2026
Updated: Oct 19, 2026
Reserved: Jun 9, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H	Linux

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
LinuxLinux	869f37d8e48f3911eb70f38a994feaa8f8380008 to before 4cdda7f868f48e2f81579371584fdbdce37df2c8Affected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before 8a1d6e40dedfe1068aee094d851bd69e289c9fd6Affected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before 0afc802160af0df61ed374fdb97fb34cfe5cdf2fAffected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before 7c34f91305292083253df6a9f6c8ede02d4ccaeaAffected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before ddddd8271359961e403d11c90c9ba9fc38914f7eAffected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before 9e5da2379f968a3ea5a6e38921ab6201576466dcAffected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before 573810f61bcd6b6815e2ff53bbdd2b9c9d747176Affected 869f37d8e48f3911eb70f38a994feaa8f8380008 to before 66eba0ffce3b7e11449946b4cbbef8ea36112f56Affected
LinuxLinux	2.6.20Affected before 2.6.20Not affected 5.10.259 through 5.10.Not affected 5.15.210 through 5.15.Not affected 6.1.176 through 6.1.Not affected 6.6.143 through 6.6.Not affected 6.12.94 through 6.12.Not affected 6.18.36 through 6.18.Not affected 7.0.13 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

869f37d8e48f3911eb70f38a994feaa8f8380008 to before 4cdda7f868f48e2f81579371584fdbdce37df2c8Affected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before 8a1d6e40dedfe1068aee094d851bd69e289c9fd6Affected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before 0afc802160af0df61ed374fdb97fb34cfe5cdf2fAffected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before 7c34f91305292083253df6a9f6c8ede02d4ccaeaAffected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before ddddd8271359961e403d11c90c9ba9fc38914f7eAffected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before 9e5da2379f968a3ea5a6e38921ab6201576466dcAffected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before 573810f61bcd6b6815e2ff53bbdd2b9c9d747176Affected
869f37d8e48f3911eb70f38a994feaa8f8380008 to before 66eba0ffce3b7e11449946b4cbbef8ea36112f56Affected

LinuxLinux

2.6.20Affected
before 2.6.20Not affected
5.10.259 through 5.10.*Not affected
5.15.210 through 5.15.*Not affected
6.1.176 through 6.1.*Not affected
6.6.143 through 6.6.*Not affected
6.12.94 through 6.12.*Not affected
6.18.36 through 6.18.*Not affected
7.0.13 through 7.0.*Not affected
7.1 and laterNot affected

References

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