{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-26899", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.187Z", "datePublished": "2024-04-17T10:27:49.089Z", "dateUpdated": "2024-06-12T16:21:49.375Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:24:41.897Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix deadlock between bd_link_disk_holder and partition scan\n\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.\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'."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/holder.c"], "versions": [{"version": "1b0a2d950ee2", "lessThan": "1e5c5b0abaee", "status": "affected", "versionType": "git"}, {"version": "1b0a2d950ee2", "lessThan": "5a87c1f7993b", "status": "affected", "versionType": "git"}, {"version": "1b0a2d950ee2", "lessThan": "03f12122b20b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/holder.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "custom"}, {"version": "6.7.11", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.8.2", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62"}, {"url": "https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98"}, {"url": "https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75"}], "title": "block: fix deadlock between bd_link_disk_holder and partition scan", "x_generator": {"engine": "bippy-a5840b7849dd"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-12T16:21:25.318881Z", "id": "CVE-2024-26899", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-12T16:21:49.375Z"}}]}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9B95D3A6-E162-47D5-ABFC-F3FA74FA7CFD", "versionEndExcluding": "6.7.11", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "543A75FF-25B8-4046-A514-1EA8EDD87AB1", "versionEndExcluding": "6.8.2", "versionStartIncluding": "6.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix deadlock between bd_link_disk_holder and partition scan\n\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.\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": "2024-04-29T19:34:10.080", "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"}]}, "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}