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However, *pdvbdev is not set to NULL\nafter dvbdev's deallocation, causing use-after-frees in many places,\nfor example, in the following call chain:\n\nbudget_register\n |-> dvb_dmxdev_init\n |-> dvb_register_device\n |-> dvb_dmxdev_release\n |-> dvb_unregister_device\n |-> dvb_remove_device\n |-> dvb_device_put\n |-> kref_put\n\nWhen calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in\ndvb_register_device) could point to memory that had been freed in\ndvb_register_device. Thereafter, this pointer is transferred to\nkref_put and triggering a use-after-free."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: medios: edia: dvbdev: corregir un use-after-free En dvb_register_device, *pdvbdev se establece igual a dvbdev, que se libera en varias rutas de manejo de errores. Sin embargo, *pdvbdev no se establece en NULL despu\u00e9s de la desasignaci\u00f3n de dvbdev, lo que provoca use-after-free en muchos lugares, por ejemplo, en la siguiente cadena de llamadas: Budget_register |-> dvb_dmxdev_init |-> dvb_register_device |-> dvb_dmxdev_release |-> dvb_unregister_device | -> dvb_remove_device |-> dvb_device_put |-> kref_put Al llamar a dvb_unregister_device, dmxdev->dvbdev (es decir, *pdvbdev en dvb_register_device) podr\u00eda apuntar a la memoria que se hab\u00eda liberado en dvb_register_device. A partir de entonces, este puntero se transfiere a kref_put y se activa un use-after-free."}], "id": "CVE-2024-27043", "lastModified": "2024-12-23T19:13:31.163", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-05-01T13:15:49.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/096237039d00c839f3e3a5fe6d001bf0db45b644"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d3fe80b6d175c220b3e252efc6c6777e700e98e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35674111a043b0482a9bc69da8850a83f465b07d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/437a111f79a2f5b2a5f21e27fdec6f40c8768712"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/779e8db7efb22316c8581d6c229636d2f5694a62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c64f4cdf4e6cc5682c52523713af8c39c94e6d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b7586e902128e4fb7bfbb661cb52e4215a65637b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d0f5c28333822f9baa5280d813124920720fd856"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f20c3270f3ed5aa6919a87e4de9bf6c05fb57086"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/096237039d00c839f3e3a5fe6d001bf0db45b644"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d3fe80b6d175c220b3e252efc6c6777e700e98e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35674111a043b0482a9bc69da8850a83f465b07d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/437a111f79a2f5b2a5f21e27fdec6f40c8768712"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/779e8db7efb22316c8581d6c229636d2f5694a62"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c64f4cdf4e6cc5682c52523713af8c39c94e6d5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b7586e902128e4fb7bfbb661cb52e4215a65637b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d0f5c28333822f9baa5280d813124920720fd856"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f20c3270f3ed5aa6919a87e4de9bf6c05fb57086"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:10282", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.30.1.rt7.371.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-11-26T00:00:00Z"}, {"advisory": "RHSA-2024:10281", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.30.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-11-26T00:00:00Z"}], "bugzilla": {"description": "kernel: media: edia: dvbdev: fix a use-after-free", "id": "2278445", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278445"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmedia: edia: dvbdev: fix a use-after-free\nIn dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed\nin several error-handling paths. However, *pdvbdev is not set to NULL\nafter dvbdev's deallocation, causing use-after-frees in many places,\nfor example, in the following call chain:\nbudget_register\n|-> dvb_dmxdev_init\n|-> dvb_register_device\n|-> dvb_dmxdev_release\n|-> dvb_unregister_device\n|-> dvb_remove_device\n|-> dvb_device_put\n|-> kref_put\nWhen calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in\ndvb_register_device) could point to memory that had been freed in\ndvb_register_device. Thereafter, this pointer is transferred to\nkref_put and triggering a use-after-free."], "name": "CVE-2024-27043", "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": "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:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-27043\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-27043\nhttps://lore.kernel.org/linux-cve-announce/2024050113-CVE-2024-27043-f2fb@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 4.19.311, kernel 5.4.273, kernel 5.10.214, kernel 5.15.153, kernel 6.1.83, kernel 6.6.23, kernel 6.7.11, kernel 6.8.2, kernel 6.9-rc1"}