CVE-2024-36932

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Dado que Thermal_debug_cdev_remove() no se ejecuta bajo cdev-&gt;lock, puede ejecutarse en paralelo con Thermal_debug_cdev_state_update() y puede liberar el objeto struct Thermal_debugfs utilizado por este \u00faltimo despu\u00e9s de haberlo verificado con NULL. Si eso sucede, Thermal_debug_cdev_state_update() acceder\u00e1 a la memoria que ya ha sido liberada, lo que provocar\u00e1 que el kernel falle. Solucione esto usando cdev-&gt;lock en Thermal_debug_cdev_remove() alrededor de la verificaci\u00f3n del valor de cdev-&gt;debugfs (en caso de que el mismo cdev se elimine al mismo tiempo en dos subprocesos diferentes) y se restablezca a NULL. CC :6.8+ # 6.8+"}], "id": "CVE-2024-36932", "lastModified": "2026-06-17T07:37:23.513", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-36932", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-06-07T14:04:33.823483Z", "version": "2.0.3"}}]}, "published": "2024-05-30T16:15:16.383", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c1279dee33369e2525f532364bb87207d23b9481"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d351eb0ab04c3e8109895fc33250cebbce9c11da"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c1279dee33369e2525f532364bb87207d23b9481"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d351eb0ab04c3e8109895fc33250cebbce9c11da"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "kernel: thermal/debugfs: Prevent use-after-free from occurring after cdev removal", "id": "2284490", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2284490"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthermal/debugfs: Prevent use-after-free from occurring after cdev removal\nSince thermal_debug_cdev_remove() does not run under cdev->lock, it can\nrun in parallel with thermal_debug_cdev_state_update() and it may free\nthe struct thermal_debugfs object used by the latter after it has been\nchecked against NULL.\nIf that happens, thermal_debug_cdev_state_update() will access memory\nthat has been freed already causing the kernel to crash.\nAddress this by using cdev->lock in thermal_debug_cdev_remove() around\nthe cdev->debugfs value check (in case the same cdev is removed at the\nsame time in two different threads) and its reset to NULL.\nCc :6.8+ <stable@vger.kernel.org> # 6.8+"], "name": "CVE-2024-36932", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-36932\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36932\nhttps://lore.kernel.org/linux-cve-announce/2024053041-CVE-2024-36932-c22d@gregkh/T"], "threat_severity": "Low"}

{}