CVE-2026-72253netfilter: nf_conntrack_sip: validate skb_dst() before accessing it
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cae3a2627520c3795b54533c5328b77af3405dbe before 7866116a040b3a23fb094e7d8f7ea3d61b3ac70b; from cae3a2627520c3795b54533c5328b77af3405dbe before c5ef7228be04518d95591fc5369a9c554b19756d; from cae3a2627520c3795b54533c5328b77af3405dbe before 0aec339694a56e263d4b22475ff7211d40900830; from cae3a2627520c3795b54533c5328b77af3405dbe before e64a48c50a1ff565a98c6a98d82b5b942868e76e; from cae3a2627520c3795b54533c5328b77af3405dbe before c199ed687c00841daf60e9d131976958583a8c09; from cae3a2627520c3795b54533c5328b77af3405dbe before 09755dc62b026076b1d47f83489eb0547c8135e0; from cae3a2627520c3795b54533c5328b77af3405dbe before b843a96252f672332837ea2ecb7c8db0acf68e20; from cae3a2627520c3795b54533c5328b77af3405dbe before e5e24a365a5e024efef63cc49abb345fbd4852c5 | CNA record |
References
- https://git.kernel.org/stable/c/7866116a040b3a23fb094e7d8f7ea3d61b3ac70b
- https://git.kernel.org/stable/c/c5ef7228be04518d95591fc5369a9c554b19756d
- https://git.kernel.org/stable/c/0aec339694a56e263d4b22475ff7211d40900830
- https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e
- https://git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09
- https://git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0
- https://git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20
- https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.