CVE-2022-50064 (GCVE-0-2022-50064)
Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2025-06-18 11:02
VLAI?
Title
virtio-blk: Avoid use-after-free on suspend/resume
Summary
In the Linux kernel, the following vulnerability has been resolved:
virtio-blk: Avoid use-after-free on suspend/resume
hctx->user_data is set to vq in virtblk_init_hctx(). However, vq is
freed on suspend and reallocated on resume. So, hctx->user_data is
invalid after resume, and it will cause use-after-free accessing which
will result in the kernel crash something like below:
[ 22.428391] Call Trace:
[ 22.428899] <TASK>
[ 22.429339] virtqueue_add_split+0x3eb/0x620
[ 22.430035] ? __blk_mq_alloc_requests+0x17f/0x2d0
[ 22.430789] ? kvm_clock_get_cycles+0x14/0x30
[ 22.431496] virtqueue_add_sgs+0xad/0xd0
[ 22.432108] virtblk_add_req+0xe8/0x150
[ 22.432692] virtio_queue_rqs+0xeb/0x210
[ 22.433330] blk_mq_flush_plug_list+0x1b8/0x280
[ 22.434059] __blk_flush_plug+0xe1/0x140
[ 22.434853] blk_finish_plug+0x20/0x40
[ 22.435512] read_pages+0x20a/0x2e0
[ 22.436063] ? folio_add_lru+0x62/0xa0
[ 22.436652] page_cache_ra_unbounded+0x112/0x160
[ 22.437365] filemap_get_pages+0xe1/0x5b0
[ 22.437964] ? context_to_sid+0x70/0x100
[ 22.438580] ? sidtab_context_to_sid+0x32/0x400
[ 22.439979] filemap_read+0xcd/0x3d0
[ 22.440917] xfs_file_buffered_read+0x4a/0xc0
[ 22.441984] xfs_file_read_iter+0x65/0xd0
[ 22.442970] __kernel_read+0x160/0x2e0
[ 22.443921] bprm_execve+0x21b/0x640
[ 22.444809] do_execveat_common.isra.0+0x1a8/0x220
[ 22.446008] __x64_sys_execve+0x2d/0x40
[ 22.446920] do_syscall_64+0x37/0x90
[ 22.447773] entry_SYSCALL_64_after_hwframe+0x63/0xcd
This patch fixes this issue by getting vq from vblk, and removes
virtblk_init_hctx().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/block/virtio_blk.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "2b54e14535bc34bf649372060d518ec9f2b893b3",
"status": "affected",
"version": "4e0400525691d0e676dbe002641f9a61261f1e1b",
"versionType": "git"
},
{
"lessThan": "8d12ec10292877751ee4463b11a63bd850bc09b5",
"status": "affected",
"version": "4e0400525691d0e676dbe002641f9a61261f1e1b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/block/virtio_blk.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"lessThan": "5.19",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"version": "5.19.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.4",
"versionStartIncluding": "5.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0",
"versionStartIncluding": "5.19",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-blk: Avoid use-after-free on suspend/resume\n\nhctx-\u003euser_data is set to vq in virtblk_init_hctx(). However, vq is\nfreed on suspend and reallocated on resume. So, hctx-\u003euser_data is\ninvalid after resume, and it will cause use-after-free accessing which\nwill result in the kernel crash something like below:\n\n[ 22.428391] Call Trace:\n[ 22.428899] \u003cTASK\u003e\n[ 22.429339] virtqueue_add_split+0x3eb/0x620\n[ 22.430035] ? __blk_mq_alloc_requests+0x17f/0x2d0\n[ 22.430789] ? kvm_clock_get_cycles+0x14/0x30\n[ 22.431496] virtqueue_add_sgs+0xad/0xd0\n[ 22.432108] virtblk_add_req+0xe8/0x150\n[ 22.432692] virtio_queue_rqs+0xeb/0x210\n[ 22.433330] blk_mq_flush_plug_list+0x1b8/0x280\n[ 22.434059] __blk_flush_plug+0xe1/0x140\n[ 22.434853] blk_finish_plug+0x20/0x40\n[ 22.435512] read_pages+0x20a/0x2e0\n[ 22.436063] ? folio_add_lru+0x62/0xa0\n[ 22.436652] page_cache_ra_unbounded+0x112/0x160\n[ 22.437365] filemap_get_pages+0xe1/0x5b0\n[ 22.437964] ? context_to_sid+0x70/0x100\n[ 22.438580] ? sidtab_context_to_sid+0x32/0x400\n[ 22.439979] filemap_read+0xcd/0x3d0\n[ 22.440917] xfs_file_buffered_read+0x4a/0xc0\n[ 22.441984] xfs_file_read_iter+0x65/0xd0\n[ 22.442970] __kernel_read+0x160/0x2e0\n[ 22.443921] bprm_execve+0x21b/0x640\n[ 22.444809] do_execveat_common.isra.0+0x1a8/0x220\n[ 22.446008] __x64_sys_execve+0x2d/0x40\n[ 22.446920] do_syscall_64+0x37/0x90\n[ 22.447773] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThis patch fixes this issue by getting vq from vblk, and removes\nvirtblk_init_hctx()."
}
],
"providerMetadata": {
"dateUpdated": "2025-06-18T11:02:11.276Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/2b54e14535bc34bf649372060d518ec9f2b893b3"
},
{
"url": "https://git.kernel.org/stable/c/8d12ec10292877751ee4463b11a63bd850bc09b5"
}
],
"title": "virtio-blk: Avoid use-after-free on suspend/resume",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50064",
"datePublished": "2025-06-18T11:02:11.276Z",
"dateReserved": "2025-06-18T10:57:27.405Z",
"dateUpdated": "2025-06-18T11:02:11.276Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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