VulnerabilityPublished 8 May 2026Updated 6 Nov 2026

CVE-2026-43328: Linux kernel · cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in da39ee627fd82b52068d4d5f115749a8b7d271f9 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in da39ee627fd82b52068d4d5f115749a8b7d271f9, d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357, 427d048e4f6acbfa01b5a8062449fe0ee8987c0d +6

Exploitation evidence

Disclosed: evidence found.
CVE published 8 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=5.1.6 <5.2	Fixed in da39ee627fd82b52068d4d5f115749a8b7d271f9 d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357 427d048e4f6acbfa01b5a8062449fe0ee8987c0d 56bc91ee78babe9578585a2bc137abc4b3115ff3 019ea28629720c220daedf38107c8787f330dc05 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e 5.2 4b9118e93d2499bb2808ef3742fa0ce06f4f8117 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d
LinuxLinux	Affected =5.2	Fixed in–

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().

References

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