CVE-2024-26899

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But\nin bd_link_disk_holder(), it is used to protect the creation of symlink\nbetween holding disk and slave bdev, which introduces some issues.\n\nWhen bd_link_disk_holder() is called, the driver is usually in the process\nof initialization/modification and may suspend submitting io. At this\ntime, any io hold 'open_mutex', such as scanning partitions, can cause\ndeadlocks. For example, in raid:\n\nT1 T2\nbdev_open_by_dev\n lock open_mutex [1]\n ...\n efi_partition\n ...\n md_submit_bio\n\t\t\t\tmd_ioctl mddev_syspend\n\t\t\t\t -> suspend all io\n\t\t\t\t md_add_new_disk\n\t\t\t\t bind_rdev_to_array\n\t\t\t\t bd_link_disk_holder\n\t\t\t\t try lock open_mutex [2]\n md_handle_request\n -> wait mddev_resume\n\nT1 scan partition, T2 add a new device to raid. T1 waits for T2 to resume\nmddev, but T2 waits for open_mutex held by T1. Deadlock occurs.\n\nFix it by introducing a local mutex 'blk_holder_mutex' to replace\n'open_mutex'."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bloque: soluciona el punto muerto entre bd_link_disk_holder y el an\u00e1lisis de partici\u00f3n. 'open_mutex' de gendisk se utiliza para proteger dispositivos de bloqueo de apertura/cierre. Pero en bd_link_disk_holder(), se utiliza para proteger la creaci\u00f3n de un enlace simb\u00f3lico entre el disco de retenci\u00f3n y el bdev esclavo, lo que introduce algunos problemas. Cuando se llama a bd_link_disk_holder(), el controlador generalmente est\u00e1 en el proceso de inicializaci\u00f3n/modificaci\u00f3n y puede suspender el env\u00edo de io. En este momento, cualquier retenci\u00f3n de io 'open_mutex', como escanear particiones, puede causar interbloqueos. Por ejemplo, en raid: T1 T2 bdev_open_by_dev lock open_mutex [1] ... efi_partition ... md_submit_bio md_ioctl mddev_syspend -> suspender todo io md_add_new_disk bind_rdev_to_array bd_link_disk_holder try lock open_mutex [2] md_handle_request -> esperar mddev_resume T1 escanear partici\u00f3n, agregar un Nuevo dispositivo para atacar. T1 espera a que T2 reanude mddev, pero T2 espera a open_mutex retenido por T1. Se produce un punto muerto. Solucionarlo introduciendo un mutex local 'blk_holder_mutex' para reemplazar 'open_mutex'."}], "id": "CVE-2024-26899", "lastModified": "2026-06-17T07:18:38.573", "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-2024-26899", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-12T16:21:25.318881Z", "version": "2.0.3"}}]}, "published": "2024-04-17T11:15:10.870", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "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: block: fix deadlock between bd_link_disk_holder and partition scan", "id": "2275650", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2275650"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblock: fix deadlock between bd_link_disk_holder and partition scan\n'open_mutex' of gendisk is used to protect open/close block devices. But\nin bd_link_disk_holder(), it is used to protect the creation of symlink\nbetween holding disk and slave bdev, which introduces some issues.\nWhen bd_link_disk_holder() is called, the driver is usually in the process\nof initialization/modification and may suspend submitting io. At this\ntime, any io hold 'open_mutex', such as scanning partitions, can cause\ndeadlocks. For example, in raid:\nT1 T2\nbdev_open_by_dev\nlock open_mutex [1]\n...\nefi_partition\n...\nmd_submit_bio\nmd_ioctl mddev_syspend\n-> suspend all io\nmd_add_new_disk\nbind_rdev_to_array\nbd_link_disk_holder\ntry lock open_mutex [2]\nmd_handle_request\n-> wait mddev_resume\nT1 scan partition, T2 add a new device to raid. T1 waits for T2 to resume\nmddev, but T2 waits for open_mutex held by T1. Deadlock occurs.\nFix it by introducing a local mutex 'blk_holder_mutex' to replace\n'open_mutex'.", "A flaw was found in the Linux kernel, where a deadlock can occur between bd_link_disk_holder and partition scan."], "name": "CVE-2024-26899", "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: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": "2024-04-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26899\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26899\nhttps://lore.kernel.org/linux-cve-announce/2024041745-CVE-2024-26899-3f41@gregkh/T"], "statement": "Red Hat Enterprise Linux 8 is not affected by this vulnerability.", "threat_severity": "Moderate"}

{}