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CVE-2026-43328 (GCVE-0-2026-43328)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:31 – Updated: 2026-06-01 16:15
VLAI
Title
cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path
Summary
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().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < 56bc91ee78babe9578585a2bc137abc4b3115ff3 (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < 4b9118e93d2499bb2808ef3742fa0ce06f4f8117 (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < 019ea28629720c220daedf38107c8787f330dc05 (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < da39ee627fd82b52068d4d5f115749a8b7d271f9 (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < 427d048e4f6acbfa01b5a8062449fe0ee8987c0d (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357 (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d (git)
Affected: 4ebe36c94aed95de71a8ce6a6762226d31c938ee , < 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e (git)
Affected: e977b1477a6725868302957e6b5c330220391797 (git)
Affected: 5.1.6 , < 5.2 (semver)
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Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43328\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-08T14:16:42.397\",\"lastModified\":\"2026-06-17T10:49:23.480\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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(\u0026dbs_data-\u003eattr_set.kobj).\\n\\nThe kobject release callback cpufreq_dbs_data_release() calls\\ngov-\u003eexit(dbs_data) and kfree(dbs_data), but the current error path\\nthen calls gov-\u003eexit(dbs_data) and kfree(dbs_data) again, causing a\\ndouble free.\\n\\nKeep the direct kfree(dbs_data) for the gov-\u003einit() failure path, but\\nafter kobject_init_and_add() has been called, let kobject_put() handle\\nthe cleanup through cpufreq_dbs_data_release().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/cpufreq/cpufreq_governor.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"56bc91ee78babe9578585a2bc137abc4b3115ff3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"4b9118e93d2499bb2808ef3742fa0ce06f4f8117\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"019ea28629720c220daedf38107c8787f330dc05\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"da39ee627fd82b52068d4d5f115749a8b7d271f9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"427d048e4f6acbfa01b5a8062449fe0ee8987c0d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"3bf9d023d2329a0e5379f2fd09d06ef09729cd9d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4ebe36c94aed95de71a8ce6a6762226d31c938ee\",\"lessThan\":\"6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e977b1477a6725868302957e6b5c330220391797\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.1.6\",\"lessThan\":\"5.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/cpufreq/cpufreq_governor.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.168\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.134\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.81\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.22\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.12\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-415\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.2\",\"versionEndExcluding\":\"5.10.253\",\"matchCriteriaId\":\"C3D51ED9-EA30-4B3D-849A-76A8B14B442E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"6.1.168\",\"matchCriteriaId\":\"D56FB7B6-F765-4875-AF39-A6EBC6F5CD4C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.134\",\"matchCriteriaId\":\"F56F925B-BAF8-4F4B-B62F-1496AF19A307\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.81\",\"matchCriteriaId\":\"6EF80433-B33B-43C5-8E64-0FA7B8DCE1BC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.22\",\"matchCriteriaId\":\"C9DF8BCE-36D3-475D-9D21-19E4F02F9029\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.12\",\"matchCriteriaId\":\"0A2B9540-02D5-41B4-B16A-82AF66FD4F36\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.1.6:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0B7D43E-3632-4F0C-9719-99E6F5752967\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"F253B622-8837-4245-BCE5-A7BF8FC76A16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F666C8D8-6538-46D4-B318-87610DE64C34\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"02259FDA-961B-47BC-AE7F-93D7EC6E90C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"1D2315C0-D46F-4F85-9754-F9E5E11374A6\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/019ea28629720c220daedf38107c8787f330dc05\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3bf9d023d2329a0e5379f2fd09d06ef09729cd9d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/427d048e4f6acbfa01b5a8062449fe0ee8987c0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4b9118e93d2499bb2808ef3742fa0ce06f4f8117\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/56bc91ee78babe9578585a2bc137abc4b3115ff3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/da39ee627fd82b52068d4d5f115749a8b7d271f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:46:35+00:00",
      "cve": "CVE-2026-43328",
      "id": "CVE-2026-43328",
      "initial_release_date": "2026-05-08T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43328.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:18:42Z",
      "cve": "CVE-2026-43328",
      "id": "CVE-2026-43328",
      "initial_release_date": "2026-05-12T03:30:51Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "665",
      "product_status:known_not_affected": "67",
      "product_status:recommended": "277",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43328",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43328.json",
      "version": "12"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.