CVE-2022-50636
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
PCI: Fix pci_device_is_present() for VFs by checking PF
pci_device_is_present() previously didn't work for VFs because it reads the Vendor and Device ID, which are 0xffff for VFs, which looks like they aren't present. Check the PF instead.
Wei Gong reported that if virtio I/O is in progress when the driver is unbound or "0" is written to /sys/.../sriov_numvfs, the virtio I/O operation hangs, which may result in output like this:
This happened because pci_device_is_present(VF) returned "false" in virtio_pci_remove(), so it called virtio_break_device(). The broken vq meant that vring_interrupt() skipped the vq.callback() that would have completed the virtio I/O operation via virtblk_done().
Leer descripción completaMostrar menos
[bhelgaas: commit log, simplify to always use pci_physfn(), add stable tag]
Detalles técnicos trazas, registros y código del informe original
task:bash state:D stack: 0 pid: 1773 ppid: 1241 flags:0x00004002 Call Trace: schedule+0x4f/0xc0 blk_mq_freeze_queue_wait+0x69/0xa0 blk_mq_freeze_queue+0x1b/0x20 blk_cleanup_queue+0x3d/0xd0 virtblk_remove+0x3c/0xb0 [virtio_blk] virtio_dev_remove+0x4b/0x80 ... device_unregister+0x1b/0x60 unregister_virtio_device+0x18/0x30 virtio_pci_remove+0x41/0x80 pci_device_remove+0x3e/0xb0
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/518573988a2f14f517403db2ece5ddaefba21e94
- https://git.kernel.org/stable/c/643d77fda08d06f863af35e80a7e517ea61d9629
- https://git.kernel.org/stable/c/65bd0962992abd42e77a05e68c7b40e7c73726d1
- https://git.kernel.org/stable/c/67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34
- https://git.kernel.org/stable/c/81565e51ccaf6fff8910e997ee22e16b5e1dabc3
- https://git.kernel.org/stable/c/98b04dd0b4577894520493d96bc4623387767445
- https://git.kernel.org/stable/c/99ef6cc791584495987dd11b14769b450dfa5820
- https://git.kernel.org/stable/c/f4b44c7766dae2b8681f621941cabe9f14066d59
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50636",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "f4b44c7766dae2b8681f621941cabe9f14066d59",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "643d77fda08d06f863af35e80a7e517ea61d9629",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "65bd0962992abd42e77a05e68c7b40e7c73726d1",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "99ef6cc791584495987dd11b14769b450dfa5820",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "81565e51ccaf6fff8910e997ee22e16b5e1dabc3",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "518573988a2f14f517403db2ece5ddaefba21e94",
"versionType": "git"
},
{
"status": "affected",
"version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
"lessThan": "98b04dd0b4577894520493d96bc4623387767445",
"versionType": "git"
}
],
"programFiles": [
"drivers/pci/pci.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.14.303",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.0.18",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.4",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/pci/pci.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-09T01:16:45.850",
"references": [
{
"url": "https://git.kernel.org/stable/c/518573988a2f14f517403db2ece5ddaefba21e94",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/643d77fda08d06f863af35e80a7e517ea61d9629",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/65bd0962992abd42e77a05e68c7b40e7c73726d1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/81565e51ccaf6fff8910e997ee22e16b5e1dabc3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/98b04dd0b4577894520493d96bc4623387767445",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/99ef6cc791584495987dd11b14769b450dfa5820",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f4b44c7766dae2b8681f621941cabe9f14066d59",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Fix pci_device_is_present() for VFs by checking PF\n\npci_device_is_present() previously didn't work for VFs because it reads the\nVendor and Device ID, which are 0xffff for VFs, which looks like they\naren't present. Check the PF instead.\n\nWei Gong reported that if virtio I/O is in progress when the driver is\nunbound or \"0\" is written to /sys/.../sriov_numvfs, the virtio I/O\noperation hangs, which may result in output like this:\n\n task:bash state:D stack: 0 pid: 1773 ppid: 1241 flags:0x00004002\n Call Trace:\n schedule+0x4f/0xc0\n blk_mq_freeze_queue_wait+0x69/0xa0\n blk_mq_freeze_queue+0x1b/0x20\n blk_cleanup_queue+0x3d/0xd0\n virtblk_remove+0x3c/0xb0 [virtio_blk]\n virtio_dev_remove+0x4b/0x80\n ...\n device_unregister+0x1b/0x60\n unregister_virtio_device+0x18/0x30\n virtio_pci_remove+0x41/0x80\n pci_device_remove+0x3e/0xb0\n\nThis happened because pci_device_is_present(VF) returned \"false\" in\nvirtio_pci_remove(), so it called virtio_break_device(). The broken vq\nmeant that vring_interrupt() skipped the vq.callback() that would have\ncompleted the virtio I/O operation via virtblk_done().\n\n[bhelgaas: commit log, simplify to always use pci_physfn(), add stable tag]"
}
],
"lastModified": "2026-06-17T05:23:54.533",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}