{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49884", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.241Z", "datePublished": "2025-05-01T14:10:30.589Z", "dateUpdated": "2025-05-04T08:47:45.294Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:47:45.294Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Initialize gfn_to_pfn_cache locks in dedicated helper\n\nMove the gfn_to_pfn_cache lock initialization to another helper and\ncall the new helper during VM/vCPU creation. There are race\nconditions possible due to kvm_gfn_to_pfn_cache_init()'s\nability to re-initialize the cache's locks.\n\nFor example: a race between ioctl(KVM_XEN_HVM_EVTCHN_SEND) and\nkvm_gfn_to_pfn_cache_init() leads to a corrupted shinfo gpc lock.\n\n (thread 1) | (thread 2)\n |\n kvm_xen_set_evtchn_fast |\n read_lock_irqsave(&gpc->lock, ...) |\n | kvm_gfn_to_pfn_cache_init\n | rwlock_init(&gpc->lock)\n read_unlock_irqrestore(&gpc->lock, ...) |\n\nRename \"cache_init\" and \"cache_destroy\" to activate+deactivate to\navoid implying that the cache really is destroyed/freed.\n\nNote, there more races in the newly named kvm_gpc_activate() that will\nbe addressed separately.\n\n[sean: call out that this is a bug fix]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/x86.c", "arch/x86/kvm/xen.c", "include/linux/kvm_host.h", "virt/kvm/pfncache.c"], "versions": [{"version": "982ed0de4753ed6e71dbd40f82a5a066baf133ed", "lessThan": "61242001d6c9c253df7645dab090842d8da08764", "status": "affected", "versionType": "git"}, {"version": "982ed0de4753ed6e71dbd40f82a5a066baf133ed", "lessThan": "52491a38b2c2411f3f0229dc6ad610349c704a41", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/x86.c", "arch/x86/kvm/xen.c", "include/linux/kvm_host.h", "virt/kvm/pfncache.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.8", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.0.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/61242001d6c9c253df7645dab090842d8da08764"}, {"url": "https://git.kernel.org/stable/c/52491a38b2c2411f3f0229dc6ad610349c704a41"}], "title": "KVM: Initialize gfn_to_pfn_cache locks in dedicated helper", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Initialize gfn_to_pfn_cache locks in dedicated helper\n\nMove the gfn_to_pfn_cache lock initialization to another helper and\ncall the new helper during VM/vCPU creation. There are race\nconditions possible due to kvm_gfn_to_pfn_cache_init()'s\nability to re-initialize the cache's locks.\n\nFor example: a race between ioctl(KVM_XEN_HVM_EVTCHN_SEND) and\nkvm_gfn_to_pfn_cache_init() leads to a corrupted shinfo gpc lock.\n\n (thread 1) | (thread 2)\n |\n kvm_xen_set_evtchn_fast |\n read_lock_irqsave(&gpc->lock, ...) |\n | kvm_gfn_to_pfn_cache_init\n | rwlock_init(&gpc->lock)\n read_unlock_irqrestore(&gpc->lock, ...) |\n\nRename \"cache_init\" and \"cache_destroy\" to activate+deactivate to\navoid implying that the cache really is destroyed/freed.\n\nNote, there more races in the newly named kvm_gpc_activate() that will\nbe addressed separately.\n\n[sean: call out that this is a bug fix]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: Inicializar bloqueos de gfn_to_pfn_cache en un asistente dedicado. Trasladar la inicializaci\u00f3n del bloqueo de gfn_to_pfn_cache a otro asistente y llamar al nuevo asistente durante la creaci\u00f3n de la m\u00e1quina virtual o la vCPU. Es posible que se produzcan condiciones de competencia debido a la capacidad de kvm_gfn_to_pfn_cache_init() de reinicializar los bloqueos de la cach\u00e9. Por ejemplo: una competencia entre ioctl(KVM_XEN_HVM_EVTCHN_SEND) y kvm_gfn_to_pfn_cache_init() provoca un bloqueo de gpc de shinfo da\u00f1ado. (hilo 1) | (hilo 2) | kvm_xen_set_evtchn_fast | read_lock_irqsave(&gpc->lock, ...) | | kvm_gfn_to_pfn_cache_init | rwlock_init(&gpc->lock) read_unlock_irqrestore(&gpc->lock, ...) | Renombra \"cache_init\" y \"cache_destroy\" como activate+deactivate para evitar que la cach\u00e9 se destruya o libere. Ten en cuenta que hay m\u00e1s ejecuciones en el nuevo nombre kvm_gpc_activate() que se abordar\u00e1n por separado. [sean: se indica que se trata de una correcci\u00f3n de error]"}], "id": "CVE-2022-49884", "lastModified": "2025-05-02T13:52:51.693", "metrics": {}, "published": "2025-05-01T15:16:13.387", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/52491a38b2c2411f3f0229dc6ad610349c704a41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/61242001d6c9c253df7645dab090842d8da08764"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: KVM: Initialize gfn_to_pfn_cache locks in dedicated helper", "id": "2363492", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363492"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: Initialize gfn_to_pfn_cache locks in dedicated helper\nMove the gfn_to_pfn_cache lock initialization to another helper and\ncall the new helper during VM/vCPU creation. There are race\nconditions possible due to kvm_gfn_to_pfn_cache_init()'s\nability to re-initialize the cache's locks.\nFor example: a race between ioctl(KVM_XEN_HVM_EVTCHN_SEND) and\nkvm_gfn_to_pfn_cache_init() leads to a corrupted shinfo gpc lock.\n(thread 1) | (thread 2)\n|\nkvm_xen_set_evtchn_fast |\nread_lock_irqsave(&gpc->lock, ...) |\n| kvm_gfn_to_pfn_cache_init\n| rwlock_init(&gpc->lock)\nread_unlock_irqrestore(&gpc->lock, ...) |\nRename \"cache_init\" and \"cache_destroy\" to activate+deactivate to\navoid implying that the cache really is destroyed/freed.\nNote, there more races in the newly named kvm_gpc_activate() that will\nbe addressed separately.\n[sean: call out that this is a bug fix]"], "name": "CVE-2022-49884", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49884\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49884\nhttps://lore.kernel.org/linux-cve-announce/2025050155-CVE-2022-49884-27c4@gregkh/T"], "threat_severity": "Moderate"}