CVE-2026-43332

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The vulnerable path is thermal zone registration/error handling exposed through local kernel device/sysfs activity, not through remote packets or an adjacent/physical protocol.\nAC:L - The race is between local userspace taking a sysfs/kobject reference and the registration error path dropping the device reference; a local attacker can influence the reference side and resource pressure, so under the overestimate rule this is low complexity.\nPR:L - No capability is needed to take references to readable thermal sysfs objects, and a basic local user can race that exposure; root-only debugfs testing paths also exist, but the higher-severity defensible metric is low privileges.\nUI:N - Exploitation does not require a separate victim to open a file or mount anything; the attacker can run local code to monitor/open the thermal sysfs object during registration failure.\nS:U - The corrupted object is in the kernel thermal core and impacts the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossing.\nC:H - The missing wait can free the thermal zone while a kobject reference keeps release deferred, producing a use-after-free on a kernel object; such memory corruption can be leveraged for kernel memory disclosure.\nI:H - The delayed release path dereferences and frees fields from the prematurely freed thermal zone, giving exploitable heap corruption/use-after-free conditions that can support arbitrary modification or code execution.\nA:H - Even without full exploitation, the use-after-free in the device release path can cause kernel oops/panic or heap corruption, resulting in high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thermal/thermal_core.c"], "versions": [{"version": "335176dd8ebaca6493807dceea33c478305667fa", "lessThan": "9e796001af97a1f7368d5114b7a8533dd98d797a", "status": "affected", "versionType": "git"}, {"version": "04e6ccfc93c5a1aa1d75a537cf27e418895e20ea", "lessThan": "604da9c04c218362e1c1457304ebeb9c199d537c", "status": "affected", "versionType": "git"}, {"version": "04e6ccfc93c5a1aa1d75a537cf27e418895e20ea", "lessThan": "c4c7219e93319bba9ba0765dee597784c78f63c5", "status": "affected", "versionType": "git"}, {"version": "04e6ccfc93c5a1aa1d75a537cf27e418895e20ea", "lessThan": "4d390f0e507dfb16d58f83a58d78d1150dc8b9d7", "status": "affected", "versionType": "git"}, {"version": "04e6ccfc93c5a1aa1d75a537cf27e418895e20ea", "lessThan": "9e07e3b81807edd356e1f794cffa00a428eff443", "status": "affected", "versionType": "git"}, {"version": "02871710b93058eb1249d5847c0b2d1c2c3c98ae", "status": "affected", "versionType": "git"}, {"version": "6.6.14", "lessThan": "6.6.134", "status": "affected", "versionType": "semver"}, {"version": "6.7.2", "lessThan": "6.8", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thermal/thermal_core.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.14", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9e796001af97a1f7368d5114b7a8533dd98d797a"}, {"url": "https://git.kernel.org/stable/c/604da9c04c218362e1c1457304ebeb9c199d537c"}, {"url": "https://git.kernel.org/stable/c/c4c7219e93319bba9ba0765dee597784c78f63c5"}, {"url": "https://git.kernel.org/stable/c/4d390f0e507dfb16d58f83a58d78d1150dc8b9d7"}, {"url": "https://git.kernel.org/stable/c/9e07e3b81807edd356e1f794cffa00a428eff443"}], "title": "thermal: core: Fix thermal zone device registration error path", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43332", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:27.233039Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:16:26.610Z"}}]}}

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Correcci\u00f3n de la ruta de error en el registro del dispositivo de zona t\u00e9rmica\n\nSi thermal_zone_device_register_with_trips() falla despu\u00e9s de registrar un dispositivo de zona t\u00e9rmica, necesita esperar la finalizaci\u00f3n de tz -> removal como thermal_zone_device_unregister(), en caso de que el espacio de usuario haya logrado tomar una referencia al kobject del dispositivo de zona t\u00e9rmica, en cuyo caso thermal_release() podr\u00eda no ser llamado por la propia ruta de error y tz podr\u00eda ser liberado prematuramente.\n\nA\u00f1adir la llamada a wait_for_completion() que falta a la ruta de error del registro del dispositivo de zona t\u00e9rmica."}], "id": "CVE-2026-43332", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43332", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:16:27.233039Z", "version": "2.0.3"}}]}, "published": "2026-05-08T14:16:42.880", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4d390f0e507dfb16d58f83a58d78d1150dc8b9d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/604da9c04c218362e1c1457304ebeb9c199d537c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e07e3b81807edd356e1f794cffa00a428eff443"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e796001af97a1f7368d5114b7a8533dd98d797a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c4c7219e93319bba9ba0765dee597784c78f63c5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: thermal: core: Fix thermal zone device registration error path", "id": "2468043", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468043"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's thermal core subsystem. When `thermal_zone_device_register_with_trips()` fails during device registration, it does not properly wait for the thermal zone device's removal completion. This can lead to the premature freeing of the device's memory, creating a use-after-free vulnerability. A local attacker could potentially exploit this to cause a denial of service."], "name": "CVE-2026-43332", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43332\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43332\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43332.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[335176dd8ebaca6493807dceea33c478305667fa,9e796001af97a1f7368d5114b7a8533dd98d797a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04e6ccfc93c5a1aa1d75a537cf27e418895e20ea,604da9c04c218362e1c1457304ebeb9c199d537c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04e6ccfc93c5a1aa1d75a537cf27e418895e20ea,c4c7219e93319bba9ba0765dee597784c78f63c5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04e6ccfc93c5a1aa1d75a537cf27e418895e20ea,4d390f0e507dfb16d58f83a58d78d1150dc8b9d7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[04e6ccfc93c5a1aa1d75a537cf27e418895e20ea,9e07e3b81807edd356e1f794cffa00a428eff443)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "02871710b93058eb1249d5847c0b2d1c2c3c98ae"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.134,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T20:00:12.751091+00:00", "updated": "2026-10-23T01:30:13.899948+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}