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 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)

Published

2026-08-15

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

References

• 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

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