netfilter: nf_conntrack_sip: validate skb_dst() before accessing it
Summary
| CVE | CVE-2026-72253 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:21:52 UTC |
| Updated | 2026-08-17 06:18:27 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.005950000 probability, percentile 0.456220000 (date 2026-08-17)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected cae3a2627520c3795b54533c5328b77af3405dbe e64a48c50a1ff565a98c6a98d82b5b942868e76e git | Not specified |
| CNA | Linux | Linux | affected cae3a2627520c3795b54533c5328b77af3405dbe c199ed687c00841daf60e9d131976958583a8c09 git | Not specified |
| CNA | Linux | Linux | affected cae3a2627520c3795b54533c5328b77af3405dbe 09755dc62b026076b1d47f83489eb0547c8135e0 git | Not specified |
| CNA | Linux | Linux | affected cae3a2627520c3795b54533c5328b77af3405dbe b843a96252f672332837ea2ecb7c8db0acf68e20 git | Not specified |
| CNA | Linux | Linux | affected cae3a2627520c3795b54533c5328b77af3405dbe e5e24a365a5e024efef63cc49abb345fbd4852c5 git | Not specified |
| CNA | Linux | Linux | affected 4.3 | Not specified |
| CNA | Linux | Linux | unaffected 4.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.148 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.101 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.42 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.