7.5

CVE-2026-72253: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it

Received
AliasesUBUNTU-CVE-2026-72253DEBIAN-CVE-2026-72253
Published 15-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-72253 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 53% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.70%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 14
OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24386-1SUSE-SU-2026:24422-1SUSE-SU-2026:24437-1SUSE-SU-2026:24446-1USN-8886-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.70% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.101-1 | < 7.1.5-1
  • linux-6.12< 6.12.101-1~deb12u1
Linux1 product
  • linux≥ cae3a2627520c3795b54533c5328b77af3405dbe, < 7866116a040b3a23fb094e7d8f7ea3d61b3ac70b | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < c5ef7228be04518d95591fc5369a9c554b19756d | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < 0aec339694a56e263d4b22475ff7211d40900830 | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < e64a48c50a1ff565a98c6a98d82b5b942868e76e | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < c199ed687c00841daf60e9d131976958583a8c09 | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < 09755dc62b026076b1d47f83489eb0547c8135e0 | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < b843a96252f672332837ea2ecb7c8db0acf68e20 | ≥ cae3a2627520c3795b54533c5328b77af3405dbe, < e5e24a365a5e024efef63cc49abb345fbd4852c5 | 4.3

3 vendors · 172 products

References

21 links
Show all 21 references