CVE-2026-53268 - Vulnerability Details

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

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.

Published: 2026-06-25

Score: 8.2 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 4cdda7f868f48e2f81579371584fdbdce37df2c8
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 8a1d6e40dedfe1068aee094d851bd69e289c9fd6
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 0afc802160af0df61ed374fdb97fb34cfe5cdf2f
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 7c34f91305292083253df6a9f6c8ede02d4ccaea
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< ddddd8271359961e403d11c90c9ba9fc38914f7e
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 9e5da2379f968a3ea5a6e38921ab6201576466dc
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 573810f61bcd6b6815e2ff53bbdd2b9c9d747176
`869f37d8e48f3911eb70f38a994feaa8f8380008`	affected	< 66eba0ffce3b7e11449946b4cbbef8ea36112f56

Linux

affected

Version	Status	Constraints
`2.6.20`	affected	—
`0`	unaffected	< 2.6.20
`5.10.259`	unaffected	≤ 5.10.*
`5.15.210`	unaffected	≤ 5.15.*
`6.1.176`	unaffected	≤ 6.1.*
`6.6.143`	unaffected	≤ 6.6.*
`6.12.94`	unaffected	≤ 6.12.*
`6.18.36`	unaffected	≤ 6.18.*
`7.0.13`	unaffected	≤ 7.0.*
`7.1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[869f37d8e48f3911eb70f38a994feaa8f8380008,4cdda7f868f48e2f81579371584fdbdce37df2c8)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,8a1d6e40dedfe1068aee094d851bd69e289c9fd6)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,0afc802160af0df61ed374fdb97fb34cfe5cdf2f)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,7c34f91305292083253df6a9f6c8ede02d4ccaea)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,ddddd8271359961e403d11c90c9ba9fc38914f7e)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,9e5da2379f968a3ea5a6e38921ab6201576466dc)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,573810f61bcd6b6815e2ff53bbdd2b9c9d747176)`	affected	code_commit	—
`[869f37d8e48f3911eb70f38a994feaa8f8380008,66eba0ffce3b7e11449946b4cbbef8ea36112f56)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`2.6.20`	affected	semver	—
`[0,2.6.20)`	unaffected	semver	—
`[5.10.259,5.11.0)`	unaffected	semver	—
`[5.15.210,5.16.0)`	unaffected	semver	—
`[6.1.176,6.2.0)`	unaffected	semver	—
`[6.6.143,6.7.0)`	unaffected	semver	—
`[6.12.94,6.13.0)`	unaffected	semver	—
`[6.18.36,6.19.0)`	unaffected	semver	—
`[7.0.13,7.1.0)`	unaffected	semver	—
`[7.1,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00364.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f
https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8
https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176
https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56
https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea
https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6
https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc
https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e
https://lore.kernel.org/linux-cve-announce/2026062517-CVE-2026-53268-9545@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-53268
https://www.cve.org/CVERecord?id=CVE-2026-53268

History

Sun, 28 Jun 2026 08:00:00 +0000

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}`	cvssV3_1 `{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'}`

Fri, 26 Jun 2026 15:15:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-788

Fri, 26 Jun 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-125
References		https://lore.kernel.org/linux-cve-announce/2026062517-CVE-2026-53268-9545@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-53268 https://www.cve.org/CVERecord?id=CVE-2026-53268
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Moderate`

Thu, 25 Jun 2026 12:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-788

Thu, 25 Jun 2026 09:15:00 +0000

Type	Values Removed	Values Added
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.
Title		netfilter: conntrack_irc: fix possible out-of-bounds read
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8 https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176 https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56 https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6 https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-06-25T08:39:54.511Z

Updated: 2026-06-28T06:41:12.729Z

Reserved: 2026-06-09T07:44:35.395Z

Link: CVE-2026-53268

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Moderate

Publid Date: 2026-06-25T00:00:00Z

Links: CVE-2026-53268 - Bugzilla

OpenCVE Enrichment

Updated: 2026-06-28T14:15:08Z

Weaknesses

CWE-125

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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