7.8

CVE-2026-43328: linux Double Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-43328DEBIAN-CVE-2026-43328
Published 08-05-2026Last modified 01-06-2026
Open JSON

Vulnerability summary

CVE-2026-43328 is a high (CVSS 7.8) Double Free vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.18%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 36 · Related 36
SUSE-SU-2026:22043-1SUSE-SU-2026:22048-1SUSE-SU-2026:22076-1SUSE-SU-2026:22087-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 08-05-2026
    PublishedVulnerability first disclosed.
  2. 01-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path When kobject_init_and_add() fails, cpufreq_dbs_governor_init() calls kobject_put(&dbs_data->attr_set.kobj). The kobject release callback cpufreq_dbs_data_release() calls gov->exit(dbs_data) and kfree(dbs_data), but the current error path then calls gov->exit(dbs_data) and kfree(dbs_data) again, causing a double free. Keep the direct kfree(dbs_data) for the gov->init() failure path, but after kobject_init_and_add() has been called, let kobject_put() handle the cleanup through cpufreq_dbs_data_release().

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

+0.05 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.18%

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

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 56bc91ee78babe9578585a2bc137abc4b3115ff3 | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 4b9118e93d2499bb2808ef3742fa0ce06f4f8117 | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 019ea28629720c220daedf38107c8787f330dc05 | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < da39ee627fd82b52068d4d5f115749a8b7d271f9 | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 427d048e4f6acbfa01b5a8062449fe0ee8987c0d | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357 | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d | ≥ 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e | e977b1477a6725868302957e6b5c330220391797 | ≥ 5.1.6, < 5.2 | 5.2
  • linux_kernelEOL≥ 5.2, < 5.10.253 | ≥ 5.11, < 6.1.168 | ≥ 6.2, < 6.6.134 | ≥ 6.7, < 6.12.81 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 5.16 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.12-1

3 vendors · 156 products

References

38 links
Show all 38 references