9.8

CVE-2026-72436: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-72436DEBIAN-CVE-2026-72436
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-72436 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.71%
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 13 · Related 13
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:4640-1SUSE-SU-2026:4687-1SUSE-SU-2026:4706-1USN-8781-1USN-8816-1

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: ipset: Don't use test_bit() in lockless RCU readers in hash types Sashiko pointed out that there are a few lockless RCU readers using test_bit() which is a relaxed atomic operation and provides no memory barrier guarantees. Use test_bit_acquire() instead where the operation may run parallel with add/del/gc, i.e. is not one from the next cases - protected by region lock - in a set destroy phase - in a new/temporary set creation phase

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.71%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

0.00 pp

From 0.71% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.71%

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 | < 7.0.0-34.34
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1013.13
  • 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≥ 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < c107233d2ff4fd7cef5d02f9124b99194957a710 | ≥ 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < 6329d3a9afe715fddda0460cfa46b496d61c2fe0 | ≥ 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < 7445fe965b7d8756070a40e80f8b73348ccda1d7 | ≥ 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < c4d257734e91bfcdc71d41843392dd6400b5bb1b | ≥ 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < 3219d74e4536658c937fd878a327257b86ce80dd | ≥ 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < e4b4984e28c16406ecb318444dea4a8bf47def3e | 4.2

3 vendors · 171 products

References

19 links
Show all 19 references