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
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:*:*:*: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    "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"
    }
  }
}



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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.