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This can likely be used\nto read arbitrary kernel memory, but can't corrupt kernel memory.\n\nFix it by calling locks_remove_posix() instead, which is designed to\nreliably get rid of POSIX locks associated with the given file and\nfiles_struct and is also used by filp_flush()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: filelock: Elimina bloqueos de manera confiable cuando se detecta fcntl/close race Cuando fcntl_setlk() corre con close(), elimina el bloqueo creado con do_lock_file_wait(). Sin embargo, los LSM pueden permitir el primer do_lock_file_wait() que cre\u00f3 el bloqueo y al mismo tiempo negar el segundo do_lock_file_wait() que intenta eliminar el bloqueo. Por separado, posix_lock_file() tambi\u00e9n podr\u00eda no eliminar un bloqueo debido a un fallo en la asignaci\u00f3n de GFP_KERNEL (al dividir un rango por la mitad). Despu\u00e9s de que se haya activado el error, se producir\u00e1n lecturas de use-after-free en lock_get_status() cuando el espacio de usuario lea /proc/locks. Es probable que esto se pueda usar para leer memoria del kernel arbitraria, pero no puede da\u00f1ar la memoria del kernel. Solucionelo llamando a locks_remove_posix() en su lugar, que est\u00e1 dise\u00f1ado para deshacerse de manera confiable de los bloqueos POSIX asociados con el archivo dado y files_struct y tambi\u00e9n lo usa filp_flush()."}], "id": "CVE-2024-41012", "lastModified": "2024-11-21T09:32:03.867", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-07-23T08:15:01.877", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3cad1bc010416c6dd780643476bc59ed742436b9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52c87ab18c76c14d7209646ccb3283b3f5d87b22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5661b9c7ec189406c2dde00837aaa4672efb6240"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f5d0799eb0a01d550c21b7894e26b2d9db55763"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b6d223942c34057fdfd8f149e763fa823731b224"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d30ff33040834c3b9eee29740acd92f9c7ba2250"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dc2ce1dfceaa0767211a9d963ddb029ab21c4235"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef8fc41cd6f95f9a4a3470f085aecf350569a0b3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3cad1bc010416c6dd780643476bc59ed742436b9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52c87ab18c76c14d7209646ccb3283b3f5d87b22"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5661b9c7ec189406c2dde00837aaa4672efb6240"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f5d0799eb0a01d550c21b7894e26b2d9db55763"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b6d223942c34057fdfd8f149e763fa823731b224"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d30ff33040834c3b9eee29740acd92f9c7ba2250"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dc2ce1dfceaa0767211a9d963ddb029ab21c4235"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef8fc41cd6f95f9a4a3470f085aecf350569a0b3"}], "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-2024:7001", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"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: filelock: Remove locks reliably when fcntl/close race is detected", "id": "2299452", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2299452"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfilelock: Remove locks reliably when fcntl/close race is detected\nWhen fcntl_setlk() races with close(), it removes the created lock with\ndo_lock_file_wait().\nHowever, LSMs can allow the first do_lock_file_wait() that created the lock\nwhile denying the second do_lock_file_wait() that tries to remove the lock.\nSeparately, posix_lock_file() could also fail to\nremove a lock due to GFP_KERNEL allocation failure (when splitting a range\nin the middle).\nAfter the bug has been triggered, use-after-free reads will occur in\nlock_get_status() when userspace reads /proc/locks. This can likely be used\nto read arbitrary kernel memory, but can't corrupt kernel memory.\nFix it by calling locks_remove_posix() instead, which is designed to\nreliably get rid of POSIX locks associated with the given file and\nfiles_struct and is also used by filp_flush()."], "name": "CVE-2024-41012", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-41012\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-41012\nhttps://lore.kernel.org/linux-cve-announce/2024072314-CVE-2024-41012-a1cf@gregkh/T"], "threat_severity": "Low"}