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CVE-2026-43328· NVD / CVE Program· CNA Linux

cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 019ea28629720c220daedf38107c8787f330dc05, 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d, 427d048e4f6acbfa01b5a8062449fe0ee8987c0d.

Low priority for now. Upgrade to Linux Linux 019ea28629720c220daedf38107c8787f330dc05, 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d, 427d048e4f6acbfa01b5a8062449fe0ee8987c0d or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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().

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 8, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 6th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.2 and later · before 5.10.253
  • linux linux kernel5.11 and later · before 6.1.168
  • linux linux kernel6.2 and later · before 6.6.134
  • linux linux kernel6.7 and later · before 6.12.81
  • linux linux kernel6.13 and later · before 6.18.22
  • linux linux kernel6.19 and later · before 6.19.12
  • linux linux kernel5.1.6
  • linux linux kernel7.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • e977b1477a6725868302957e6b5c330220391797, 5.2affected
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before 56bc91ee78babe9578585a2bc137abc4b3115ff3affected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before 4b9118e93d2499bb2808ef3742fa0ce06f4f8117affected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before 019ea28629720c220daedf38107c8787f330dc05affected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before da39ee627fd82b52068d4d5f115749a8b7d271f9affected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before 427d048e4f6acbfa01b5a8062449fe0ee8987c0daffected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357affected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before 3bf9d023d2329a0e5379f2fd09d06ef09729cd9daffected · git
    • 4ebe36c94aed95de71a8ce6a6762226d31c938ee and later · before 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1eaffected · git
    • 5.1.6 and later · before 5.2affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.12-16.19.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43326May 8, 2026 · sched_ext: Fix SCX_KICK_WAIT deadlock by deferring wait to balance callback
    22Monitor
  • ← EarlierCVE-2026-43327May 8, 2026 · USB: dummy-hcd: Fix locking/synchronization error
    22Monitor
  • Later →CVE-2026-43330May 8, 2026 · crypto: caam - fix overflow on long hmac keys
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux019ea28629720c220daedf38107c8787f330dc05Vendor (CNA)
Linux Linux3bf9d023d2329a0e5379f2fd09d06ef09729cd9dVendor (CNA)
Linux Linux427d048e4f6acbfa01b5a8062449fe0ee8987c0dVendor (CNA)
Linux Linux4b9118e93d2499bb2808ef3742fa0ce06f4f8117Vendor (CNA)
Linux Linux5.2Vendor (CNA)
Linux Linux56bc91ee78babe9578585a2bc137abc4b3115ff3Vendor (CNA)
Linux Linux6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1eVendor (CNA)
Linux Linuxd2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357Vendor (CNA)
Linux Linuxda39ee627fd82b52068d4d5f115749a8b7d271f9Vendor (CNA)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-434140 days apartscsi: qla2xxx: Completely fix fcport double free
    39Monitor
  • CVE-2026-430117 days apartnet/x25: Fix potential double free of skb
    39Monitor
  • CVE-2026-3160814 days apartsmb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
    39Monitor
  • CVE-2026-3160914 days apartsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
    39Monitor
  • CVE-2026-5299347 days aparttipc: fix double-free in tipc_buf_append()
    39Monitor
  • CVE-2026-6438478 days apartsmb: client: fix change notify replay double-free
    39Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records