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CVE-2026-72253

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing informa…

Published Aug 15, 2026EPSS 0.70%

Overview

CVE-2026-72253 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it

tc ingress and openvswitch do not guarantee routing information to be

available. These subsystems use the conntrack helper infrastructure, and

the SIP helper relies on the skb_dst() to be present if

sip_external_media is set to 1 (which is disabled by default as a module

parameter).

This effectively disables the sip_external_media toggle for these

subsystems without resulting in a crash.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0Refgit.kernel.org/stable/c/0aec339694a56e263d4b22475ff7211d40900830Refgit.kernel.org/stable/c/7866116a040b3a23fb094e7d8f7ea3d61b3ac70bRefgit.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20Refgit.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09Refgit.kernel.org/stable/c/c5ef7228be04518d95591fc5369a9c554b19756dRefgit.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5Refgit.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72253?

CVE-2026-72253 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-72253?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-72253?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-72253?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72253 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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