CVE-2026-43328

CVEs › CVE-2026-43328

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().

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: high
CVSS score: 7.8 / 10
CVSS vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Effective score: 7.8 / 10 HIGH source: CNA overview
CWE(s): —
Reserved: 2026-05-01
Published: 2026-05-08 15:31 UTC
Last updated: 2026-05-12 00:22 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43328.json
Linked Threat: CVE-2026-43328 — CVE-2026-43328

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-08 14:16:42 UTC
NVD last modified: 2026-05-18 12:43:45 UTC
NVD CVSS v3.1: 7.8 / 10 HIGH source: nvd@nist.gov
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 1.8 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0001 (probability of exploitation in next 30 days)
EPSS percentile: 2.55% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD-assigned CWE(s): CWE-415 (differs from the CNA list above)

NVD / KEV / EPSS data refreshed 2026-05-25 08:59 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-28612
Assigner: Linux
Published: May 8, 2026, 1:31:16 PM
Updated: May 23, 2026, 4:06:43 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.0100
Vendors: Linux
Products: Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <3bf9d023d2329a0e5379f2fd09d06ef09729cd9d)

Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <427d048e4f6acbfa01b5a8062449fe0ee8987c0d)

Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e)

Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <da39ee627fd82b52068d4d5f115749a8b7d271f9)

Linux (5.1.6 <5.2)

Linux (e977b1477a6725868302957e6b5c330220391797)

Linux (patch: 6.6.134)

Linux (patch: 6.18.22)

Linux (patch: 6.19.12)

Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357)

Linux (patch: 7.0)

Linux (patch: 6.12.81)

Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <019ea28629720c220daedf38107c8787f330dc05)

Linux (4ebe36c94aed95de71a8ce6a6762226d31c938ee <56bc91ee78babe9578585a2bc137abc4b3115ff3)

Linux (patch: 0)

Linux (patch: 6.1.168)

Linux (5.2)

Linux (patch: 5.10.253)

ENISA 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().

EUVD references (7)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `4ebe36c94aed95de71a8ce6a6762226d31c938ee` (affected), `e977b1477a6725868302957e6b5c330220391797` (affected)	—
Linux	Linux	`5.2` (affected), `0` (unaffected), `5.10.253` (unaffected), `6.1.168` (unaffected), `6.6.134` (unaffected), `6.12.81` (unaffected), `6.18.22` (unaffected), `6.19.12` (unaffected), `7.0` (unaffected)	—

Affected products — CPE 2.3 (8) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.1.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*

Vendor references (7)

References embedded in the original CVE record by the assigning CNA.

MITRE references (7) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (7)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://git.kernel.org/stable/c/4b9118e93d2499bb2808ef3742fa0ce06f4f8117 tenable:git.kernel.org
https://attackerkb.com/topics/CVE-2026-43328 rapid7:attackerkb.com
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28612 rapid7:euvd.enisa.europa.eu
http://cwe.mitre.org/data/definitions/415.html rapid7:cwe.mitre.org
https://www.first.org/epss/ tenable:www.first.org
https://nvd.nist.gov/vuln/detail/CVE-2026-43328 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-43328 tenable:www.cve.org

NVD-tagged references (7)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://git.kernel.org/stable/c/019ea28629720c220daedf38107c8787f330dc05 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/3bf9d023d2329a0e5379f2fd09d06ef09729cd9d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/427d048e4f6acbfa01b5a8062449fe0ee8987c0d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/56bc91ee78babe9578585a2bc137abc4b3115ff3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/da39ee627fd82b52068d4d5f115749a8b7d271f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

RHSB-2026-003 Networking subsystem Privilege Escalation - Linux Kernel ...

web:access.redhat.com

The mitigation methods below address both vulnerabilities that affect Red Hat products — CVE - 2026 -43284 (IPsec ESP) and CVE - 2026 -46300 (XFRM ESP-in-TCP). CVE - 2026 -43500 (rxrpc) does not affect Red Hat products and requires no mitigation .

2026-05-23 21:06 UTC
Six Patch Management Best Practices [Updated 2026]

web:heimdalsecurity.com

Explore six essential patch management best practices for 2026 to keep your systems secure, up to date, and protected from vulnerabilities.

2026-05-23 21:06 UTC
Patch Tuesday, May 2026 Edition - Krebs on Security

web:krebsonsecurity.com

Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.

2026-05-23 21:06 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-23 21:06 UTC
CVE-2026-43500 and CVE-2026-43284 analysis

web:socprime.com

Explore Detections CVE - 2026 -43500 and CVE - 2026 -43284 Mitigation Practical CVE - 2026 -43500 mitigation starts with reducing available attack paths before a vendor patch is fully available across environments.

2026-05-23 21:06 UTC
A guide to vulnerability remediation vs mitigation | @Bugcrowd

web:www.bugcrowd.com

Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.

2026-05-23 21:06 UTC
PDF CISA Insights - Cyber: Remediate Vulnerabilities for Internet ...

web:www.cisa.gov

If vulnerabilities cannot be remediated within the recommended timeframes, develop a remediation plan for action and coordination across the organization. The remediation plan should include: Vulnerability remediation constraints Interim mitigation actions to overcome constraints Final actions required to remediate vulnerability

2026-05-23 21:06 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-23 21:06 UTC
Vulnerability Remediation vs. Mitigation: What are the Differences ...

web:www.secure.com

Learn the difference between vulnerability remediation and mitigation , and how a risk-based strategy can strengthen your security posture.

2026-05-23 21:06 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-23 21:06 UTC
Security Advisory Bulletin 064 | Ubiquiti Community

web:community.ui.com

Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

2026-05-26 02:49 UTC
Microsoft Patch Tuesday March 2026 - 78 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...

2026-05-26 02:49 UTC
Patch Tuesday, April 2026 Edition - Krebs on Security

web:krebsonsecurity.com

For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

2026-05-26 02:49 UTC
March 23, 2026—Hotpatch KB5085518 (OS Builds 26200.7985 and 26100.7985 ...

web:support.microsoft.com

This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5085518) includes fixes and improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates ...

2026-05-26 02:49 UTC
Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days

web:www.bleepingcomputer.com

Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

2026-05-26 02:49 UTC
Critical Patches Issued for Microsoft Products, April 14, 2026

web:www.cisecurity.org

<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

2026-05-26 02:49 UTC
May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

2026-05-26 02:49 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43328.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/cpufreq/cpufreq_governor.c"
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          "versions": [
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            },
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.168",
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            {
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            },
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.22",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                },
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                  "versionStartIncluding": "5.1.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path\n\nWhen kobject_init_and_add() fails, cpufreq_dbs_governor_init() calls\nkobject_put(&dbs_data->attr_set.kobj).\n\nThe kobject release callback cpufreq_dbs_data_release() calls\ngov->exit(dbs_data) and kfree(dbs_data), but the current error path\nthen calls gov->exit(dbs_data) and kfree(dbs_data) again, causing a\ndouble free.\n\nKeep the direct kfree(dbs_data) for the gov->init() failure path, but\nafter kobject_init_and_add() has been called, let kobject_put() handle\nthe cleanup through cpufreq_dbs_data_release()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:22:26.516Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/56bc91ee78babe9578585a2bc137abc4b3115ff3"
        },
        {
          "url": "https://git.kernel.org/stable/c/019ea28629720c220daedf38107c8787f330dc05"
        },
        {
          "url": "https://git.kernel.org/stable/c/da39ee627fd82b52068d4d5f115749a8b7d271f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/427d048e4f6acbfa01b5a8062449fe0ee8987c0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357"
        },
        {
          "url": "https://git.kernel.org/stable/c/3bf9d023d2329a0e5379f2fd09d06ef09729cd9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e"
        }
      ],
      "title": "cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43328",
    "datePublished": "2026-05-08T13:31:16.787Z",
    "dateReserved": "2026-05-01T14:12:56.002Z",
    "dateUpdated": "2026-05-11T22:22:26.516Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}