5.7

CVE-2026-72236: s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init()

Received
AliasesUBUNTU-CVE-2026-72236DEBIAN-CVE-2026-72236
Published 15-08-2026Last modified 23-08-2026

Vulnerability summary

CVE-2026-72236 is a medium (CVSS 5.7) vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.7/10
010
Medium · v4.0 (OSV · Ubuntu), selected by version preference
EPSS score
0.23%
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 18 · Related 18
OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24371-1SUSE-SU-2026:24379-1SUSE-SU-2026:24386-1SUSE-SU-2026:24422-1SUSE-SU-2026:24437-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 23-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init() ev variable is userspace controlled via event->attr.config and used as an array index after bounds checking, but without speculation barriers. Add the missing array_index_nospec() call to prevent speculative execution.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.23% 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: local access, low-privilege account, 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)
Debian1 product
  • linux< 6.1.187-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ 212188a596d17d519842ef2173150315735b54e1, < 4c249b214c686f9a1c4cf4f32893b59b189e897a | ≥ 212188a596d17d519842ef2173150315735b54e1, < 27206bb57c47bdbe33bccc78fa7f7e2a719a06b9 | ≥ 212188a596d17d519842ef2173150315735b54e1, < a21f3615c88421df81060b6ff89220fd34094c4d | ≥ 212188a596d17d519842ef2173150315735b54e1, < fa1ebae4206e6afc8caa642e9eb1bbe39a9a724f | ≥ 212188a596d17d519842ef2173150315735b54e1, < f79dff8c721bbb1f3fc312ea55e0551c2cc28801 | ≥ 212188a596d17d519842ef2173150315735b54e1, < 49145bce539117db4b6e9e83c0e5ef528e361050 | 3.4

3 vendors · 171 products

References

18 links
Show all 18 references