CVE-2026-72253

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.5
EG Score
7.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e
generic

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5
generic

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09
generic

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20
generic

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0

Vendor Advisories for CVE-2026-72253(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 29× in last 7d / 29× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 11:42 UTCGHSA enrichment
  2. 2026-08-20 00:43 UTCEG score recompute
  3. 2026-08-20 00:42 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 13:41 UTCGHSA enrichment
  6. 2026-08-19 02:39 UTCGHSA enrichment
  7. 2026-08-18 15:36 UTCEG score recompute
  8. 2026-08-18 15:36 UTCGHSA enrichment
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 04:20 UTCGHSA enrichment
  12. 2026-08-17 17:21 UTCEG score recompute
  13. 2026-08-17 17:21 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 06:20 UTCEG score recompute
  16. 2026-08-17 06:20 UTCGHSA enrichment
  17. 2026-08-17 05:59 UTCEG score recompute▲ 7.50
  18. 2026-08-17 05:59 UTCGHSA enrichment
  19. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  20. 2026-08-17 05:31 UTCEG score recompute
  21. 2026-08-17 05:31 UTCGHSA enrichment
  22. 2026-08-17 05:24 UTCMITRE cvelistV5
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 02:15 UTCEPSS rescore
Show 4 more
  1. 2026-08-15 06:39 UTCGHSA enrichment
  2. 2026-08-15 06:23 UTCNVD update
  3. 2026-08-15 06:09 UTCEG score recompute
  4. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72253?
CVE-2026-72253 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: 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…
When was CVE-2026-72253 disclosed?
CVE-2026-72253 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72253 actively exploited?
CVE-2026-72253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.1% of all scored CVEs.
What is the CVSS score of CVE-2026-72253?
CVE-2026-72253 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-72253?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72253, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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