CVE-2026-72253high

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.7%

exploitation probability

0.7%top 49% of all CVEs

observed exploitation

nono source reports it

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

Affected products

Linux · Linux

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 https://git.kernel.org/stable/c/c5ef7228be04518d95591fc5369a9c554b19756d https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5 https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e