8.2
HIGH
CVSS 3.1
CVE-2026-53268
netfilter: conntrack_irc: fix possible out-of-bounds read
Overview
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.
Details
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
Sept. 8, 2026, 9:18 a.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Apply kernel updates to fix an out-of-bounds read in netfilter.
- Update the Linux kernel.
- Ensure netfilter module is patched.
- Review relevance of IRC parsing.
- Consider deprecating the helper.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53268.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53268 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53268
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53268 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53268 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 08, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f Added Reference https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8 Added Reference https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176 Added Reference https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56 Added Reference https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea Added Reference https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6 Added Reference https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc Added Reference https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e Removed Reference https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f Removed Reference https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8 Removed Reference https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176 Removed Reference https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56 Removed Reference https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea Removed Reference https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6 Removed Reference https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc Removed Reference https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e Removed Reference Type https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f Types: Patch Removed Reference Type https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea Types: Patch Removed Reference Type https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6 Types: Patch Removed Reference Type https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc Types: Patch Removed Reference Type https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e Types: Patch -
CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Sep. 08, 2026
Action Type Old Value New Value Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/53xxx/CVE-2026-53268.json">CVE-2026-53268</a> Added Reference https://cert-portal.siemens.com/productcert/html/ssa-019113.html -
Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CWE CWE-125 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.20 up to (excluding) 5.10.259 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '4cdda7f868f48e2f81579371584fdbdce37df2c8', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '8a1d6e40dedfe1068aee094d851bd69e289c9fd6', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '0afc802160af0df61ed374fdb97fb34cfe5cdf2f', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '7c34f91305292083253df6a9f6c8ede02d4ccaea', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': 'ddddd8271359961e403d11c90c9ba9fc38914f7e', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '9e5da2379f968a3ea5a6e38921ab6201576466dc', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '573810f61bcd6b6815e2ff53bbdd2b9c9d747176', 'versionType': 'git'}, {'status': 'affected', 'version': '869f37d8e48f3911eb70f38a994feaa8f8380008', 'lessThan': '66eba0ffce3b7e11449946b4cbbef8ea36112f56', 'versionType': 'git'}], 'programFiles': ['net/netfilter/nf_conntrack_irc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.20'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.20', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/netfilter/nf_conntrack_irc.c'], 'defaultStatus': 'affected'}] 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. Added Reference https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f Added Reference https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8 Added Reference https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176 Added Reference https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56 Added Reference https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea Added Reference https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6 Added Reference https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc Added Reference https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.