8.4

CVE-2026-72243: linux

CVSS: 8.4v3.1HighReceived
AliasesUBUNTU-CVE-2026-72243DEBIAN-CVE-2026-72243
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-72243 is a high (CVSS 8.4) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.4% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 19
OPENSUSE-SU-2026:21910-1RHSA-2026:68570RHSA-2026:71233SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1

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: selinux: check connect-related permissions on TCP Fast Open Similar to Landlock, SELinux was not updated when TCP Fast Open support was introduced to ensure connect-related permissions are checked when using TCP Fast Open. Update its socket_sendmsg() hook to call selinux_socket_connect() when MSG_FASTOPEN is passed.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

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)
Debian1 product
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ cf60af03ca4e71134206809ea892e49b92a88896, < 11406d0d7e11b4e525bb2ace2c70107031d058da | ≥ cf60af03ca4e71134206809ea892e49b92a88896, < e507633bf76bccf1a6af27771fb0d6e2862b7eac | ≥ cf60af03ca4e71134206809ea892e49b92a88896, < d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3 | ≥ cf60af03ca4e71134206809ea892e49b92a88896, < fc633a598206d4f23af782db7c0b5f3a82751d2c | ≥ cf60af03ca4e71134206809ea892e49b92a88896, < 646ebbc5f2ff9147d084e1213143f091026a611c | ≥ cf60af03ca4e71134206809ea892e49b92a88896, < 44c74d27d1b9aaa99fa8a83640c1223575262b80 | 3.6

3 vendors · 171 products

References

19 links
Show all 19 references