5.5

CVE-2026-46021: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-46021DEBIAN-CVE-2026-46021
Published 27-05-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-46021 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.14%
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 44 · Related 44
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:20965-1SUSE-SU-2026:22099-1SUSE-SU-2026:22108-1SUSE-SU-2026:22112-1SUSE-SU-2026:22117-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix thermal zone governor cleanup issues If thermal_zone_device_register_with_trips() fails after adding a thermal governor to the thermal zone being registered, the governor is not removed from it as appropriate which may lead to a memory leak. In turn, thermal_zone_device_unregister() calls thermal_set_governor() without acquiring the thermal zone lock beforehand which may race with a governor update via sysfs and may lead to a use-after-free in that case. Address these issues by adding two thermal_set_governor() calls, one to thermal_release() to remove the governor from the given thermal zone, and one to the thermal zone registration error path to cover failures preceding the thermal zone device registration.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.14% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.14%

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

Affected systems

Ubuntu159 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < a172fa18bc370b776ac1510abb0dcb50a7a35fac | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < 8e563d8db50f303171aceb79eec0807e7ba06951 | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < d4eb861adde5ce22e459fbd29366f47bb2167977 | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < 37a430a2d4e66ec8238da6c7f7e48809bf265e13 | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < f412e541d25a3dfaf3d53e012ade6ff03cae8a45 | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < 75f8f3c3e09122270986de9d7aa347d701676761 | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 | ≥ e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8, < 41ff66baf81c6541f4f985dd7eac4494d03d9440 | 4.2
  • linux_kernel≥ 4.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 162 products

References

42 links
Show all 42 references