CVE-2026-72253

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0
https://git.kernel.org/stable/c/0aec339694a56e263d4b22475ff7211d40900830
https://git.kernel.org/stable/c/7866116a040b3a23fb094e7d8f7ea3d61b3ac70b
https://git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20
https://git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09
https://git.kernel.org/stable/c/c5ef7228be04518d95591fc5369a9c554b19756d
https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5
https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-23 13:16

NVD link : CVE-2026-72253

Mitre link : CVE-2026-72253

CVE.ORG link : CVE-2026-72253

JSON object : View

Products Affected

No product.

CWE

No CWE.

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These subsystems use the conntrack helper infrastructure, and\nthe SIP helper relies on the skb_dst() to be present if\nsip_external_media is set to 1 (which is disabled by default as a module\nparameter).\n\nThis effectively disables the sip_external_media toggle for these\nsubsystems without resulting in a crash."}], "lastModified": "2026-08-23T13:16:42.497", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}