CVE-2026-53268
CVE-2026-53268 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 0% (28th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-39219
- Weakness: CWE-125
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-53268?
- 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.
- How severe is CVE-2026-53268?
- CVE-2026-53268 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.
- Is CVE-2026-53268 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-53268?
- CVE-2026-53268 primarily affects Linux Linux Kernel. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-53268?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-53268 have an EU (EUVD) identifier?
- Yes. CVE-2026-53268 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39219.
- When was CVE-2026-53268 published?
- CVE-2026-53268 was published on 2026-06-25 and last updated on 2026-07-08.
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
Affected products (7)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- 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:7.1:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
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