CVE-2026-72253

HIGH 7.5

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Aug 15, 2026
Last Updated	Aug 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Linux / Linux

cae3a2627520c3795b54533c5328b77af3405dbe < 7866116a040b3a23fb094e7d8f7ea3d61b3ac70b cae3a2627520c3795b54533c5328b77af3405dbe < c5ef7228be04518d95591fc5369a9c554b19756d cae3a2627520c3795b54533c5328b77af3405dbe < 0aec339694a56e263d4b22475ff7211d40900830 cae3a2627520c3795b54533c5328b77af3405dbe < e64a48c50a1ff565a98c6a98d82b5b942868e76e cae3a2627520c3795b54533c5328b77af3405dbe < c199ed687c00841daf60e9d131976958583a8c09 cae3a2627520c3795b54533c5328b77af3405dbe < 09755dc62b026076b1d47f83489eb0547c8135e0 cae3a2627520c3795b54533c5328b77af3405dbe < b843a96252f672332837ea2ecb7c8db0acf68e20 cae3a2627520c3795b54533c5328b77af3405dbe < e5e24a365a5e024efef63cc49abb345fbd4852c5

Linux / Linux

4.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗