5.5

CVE-2026-64213: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-64213DEBIAN-CVE-2026-64213
Published 24-07-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-64213 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.7% 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
0.12%
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 10 · Related 10
SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:4640-1SUSE-SU-2026:4706-1USN-8618-1USN-8663-1

Timeline

  1. 24-07-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Add lock protection to lm90_alert Sashiko reports: lm90_alert() executes in the smbus alert context and calls lm90_update_confreg() to disable the hardware alert line, without acquiring hwmon_lock. Concurrently, sysfs write operations (such as lm90_write_convrate) hold the hwmon_lock, temporarily modify data->config, and then restore it. If an alert interrupt occurs concurrently with a sysfs write, the sysfs path will overwrite the alert handler's modifications to data->config and the hardware register. This unintentionally re-enables the hardware alert line while the alarm is still active, causing an interrupt storm. Add the missing lock to lm90_alert() to solve the problem.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.12%

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

Ubuntu164 products
  • linuxAll versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < 02b88fa993582b4fe228b4143b330b0bb9f28353 | ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < 165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e | ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < bed1fc32e0eb653806fa98afcf55f9a311fc4ce2 | ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < b0b66aae8a94c3663d47e4000b0e81b89ce32186 | ≥ 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f, < 873e919e3101063a7a75989510ccfc125a4391cf | 5.3
  • linux_kernel≥ 5.3, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3
Debian1 product
  • linuxAll versions (No fix recorded) | < 7.0.12-1

3 vendors · 167 products

References

15 links
Show all 15 references