Action not permitted
Modal body text goes here.
gsd-2024-26976
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.
Aliases
{
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2024-26976"
],
"id": "GSD-2024-26976",
"modified": "2024-02-20T06:02:29.325546Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "cve@mitre.org",
"ID": "CVE-2024-26976",
"STATE": "RESERVED"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
}
]
}
}
}
}
cve-2024-26976
Vulnerability from cvelistv5
Published
2024-05-01 05:20
Modified
2024-11-05 09:19
Severity ?
EPSS score ?
Summary
KVM: Always flush async #PF workqueue when vCPU is being destroyed
References
{
"containers": {
"adp": [
{
"affected": [
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "ab2c2f5d9576",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "82e25cc1c2e9",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "8730d6335e5",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "83d3c5e30961",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "b54478d20375",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "a75afe480d43",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "4f3a3bce428f",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "caa9af2e27c2",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "3d75b8aa5c29",
"status": "affected",
"version": "af585b921e5d",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"status": "affected",
"version": "2.6.38"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThan": "2.6.38",
"status": "unaffected",
"version": "0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "4.20",
"status": "unaffected",
"version": "4.19.312",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "5.5",
"status": "unaffected",
"version": "5.4.274",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "5.11",
"status": "unaffected",
"version": "5.10.215",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "5.16",
"status": "unaffected",
"version": "5.15.154",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "6.2",
"status": "unaffected",
"version": "6.1.84",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "6.7",
"status": "unaffected",
"version": "6.6.24",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "6.8",
"status": "unaffected",
"version": "6.7.12",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"lessThanOrEqual": "6.9",
"status": "unaffected",
"version": "6.8.3",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "linux_kernel",
"vendor": "linux",
"versions": [
{
"status": "unaffected",
"version": "6.9"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2024-26976",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-06-18T18:39:36.198113Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400 Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-06-18T19:43:43.628Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2024-08-02T00:21:05.782Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/ab2c2f5d9576112ad22cfd3798071cb74693b1f5"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/82e25cc1c2e93c3023da98be282322fc08b61ffb"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/f8730d6335e5f43d09151fca1f0f41922209a264"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/83d3c5e309611ef593e2fcb78444fc8ceedf9bac"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/b54478d20375874aeee257744dedfd3e413432ff"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/a75afe480d4349c524d9c659b1a5a544dbc39a98"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/4f3a3bce428fb439c66a578adc447afce7b4a750"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/caa9af2e27c275e089d702cfbaaece3b42bca31b"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/3d75b8aa5c29058a512db29da7cbee8052724157"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"virt/kvm/async_pf.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ab2c2f5d9576",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "82e25cc1c2e9",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "f8730d6335e5",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "83d3c5e30961",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "b54478d20375",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "a75afe480d43",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "4f3a3bce428f",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "caa9af2e27c2",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
},
{
"lessThan": "3d75b8aa5c29",
"status": "affected",
"version": "af585b921e5d",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"virt/kvm/async_pf.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.38"
},
{
"lessThan": "2.6.38",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.312",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.274",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.215",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.154",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.84",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.24",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"version": "6.7.12",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.8.*",
"status": "unaffected",
"version": "6.8.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Always flush async #PF workqueue when vCPU is being destroyed\n\nAlways flush the per-vCPU async #PF workqueue when a vCPU is clearing its\ncompletion queue, e.g. when a VM and all its vCPUs is being destroyed.\nKVM must ensure that none of its workqueue callbacks is running when the\nlast reference to the KVM _module_ is put. Gifting a reference to the\nassociated VM prevents the workqueue callback from dereferencing freed\nvCPU/VM memory, but does not prevent the KVM module from being unloaded\nbefore the callback completes.\n\nDrop the misguided VM refcount gifting, as calling kvm_put_kvm() from\nasync_pf_execute() if kvm_put_kvm() flushes the async #PF workqueue will\nresult in deadlock. async_pf_execute() can\u0027t return until kvm_put_kvm()\nfinishes, and kvm_put_kvm() can\u0027t return until async_pf_execute() finishes:\n\n WARNING: CPU: 8 PID: 251 at virt/kvm/kvm_main.c:1435 kvm_put_kvm+0x2d/0x320 [kvm]\n Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel kvm irqbypass\n CPU: 8 PID: 251 Comm: kworker/8:1 Tainted: G W 6.6.0-rc1-e7af8d17224a-x86/gmem-vm #119\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n Workqueue: events async_pf_execute [kvm]\n RIP: 0010:kvm_put_kvm+0x2d/0x320 [kvm]\n Call Trace:\n \u003cTASK\u003e\n async_pf_execute+0x198/0x260 [kvm]\n process_one_work+0x145/0x2d0\n worker_thread+0x27e/0x3a0\n kthread+0xba/0xe0\n ret_from_fork+0x2d/0x50\n ret_from_fork_asm+0x11/0x20\n \u003c/TASK\u003e\n ---[ end trace 0000000000000000 ]---\n INFO: task kworker/8:1:251 blocked for more than 120 seconds.\n Tainted: G W 6.6.0-rc1-e7af8d17224a-x86/gmem-vm #119\n \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n task:kworker/8:1 state:D stack:0 pid:251 ppid:2 flags:0x00004000\n Workqueue: events async_pf_execute [kvm]\n Call Trace:\n \u003cTASK\u003e\n __schedule+0x33f/0xa40\n schedule+0x53/0xc0\n schedule_timeout+0x12a/0x140\n __wait_for_common+0x8d/0x1d0\n __flush_work.isra.0+0x19f/0x2c0\n kvm_clear_async_pf_completion_queue+0x129/0x190 [kvm]\n kvm_arch_destroy_vm+0x78/0x1b0 [kvm]\n kvm_put_kvm+0x1c1/0x320 [kvm]\n async_pf_execute+0x198/0x260 [kvm]\n process_one_work+0x145/0x2d0\n worker_thread+0x27e/0x3a0\n kthread+0xba/0xe0\n ret_from_fork+0x2d/0x50\n ret_from_fork_asm+0x11/0x20\n \u003c/TASK\u003e\n\nIf kvm_clear_async_pf_completion_queue() actually flushes the workqueue,\nthen there\u0027s no need to gift async_pf_execute() a reference because all\ninvocations of async_pf_execute() will be forced to complete before the\nvCPU and its VM are destroyed/freed. And that in turn fixes the module\nunloading bug as __fput() won\u0027t do module_put() on the last vCPU reference\nuntil the vCPU has been freed, e.g. if closing the vCPU file also puts the\nlast reference to the KVM module.\n\nNote that kvm_check_async_pf_completion() may also take the work item off\nthe completion queue and so also needs to flush the work queue, as the\nwork will not be seen by kvm_clear_async_pf_completion_queue(). Waiting\non the workqueue could theoretically delay a vCPU due to waiting for the\nwork to complete, but that\u0027s a very, very small chance, and likely a very\nsmall delay. kvm_arch_async_page_present_queued() unconditionally makes a\nnew request, i.e. will effectively delay entering the guest, so the\nremaining work is really just:\n\n trace_kvm_async_pf_completed(addr, cr2_or_gpa);\n\n __kvm_vcpu_wake_up(vcpu);\n\n mmput(mm);\n\nand mmput() can\u0027t drop the last reference to the page tables if the vCPU is\nstill alive, i.e. the vCPU won\u0027t get stuck tearing down page tables.\n\nAdd a helper to do the flushing, specifically to deal with \"wakeup all\"\nwork items, as they aren\u0027t actually work items, i.e. are never placed in a\nworkqueue. Trying to flush a bogus workqueue entry rightly makes\n__flush_work() complain (kudos to whoever added that sanity check).\n\nNote, commit 5f6de5cbebee (\"KVM: Prevent module exit until al\n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2024-11-05T09:19:15.865Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ab2c2f5d9576112ad22cfd3798071cb74693b1f5"
},
{
"url": "https://git.kernel.org/stable/c/82e25cc1c2e93c3023da98be282322fc08b61ffb"
},
{
"url": "https://git.kernel.org/stable/c/f8730d6335e5f43d09151fca1f0f41922209a264"
},
{
"url": "https://git.kernel.org/stable/c/83d3c5e309611ef593e2fcb78444fc8ceedf9bac"
},
{
"url": "https://git.kernel.org/stable/c/b54478d20375874aeee257744dedfd3e413432ff"
},
{
"url": "https://git.kernel.org/stable/c/a75afe480d4349c524d9c659b1a5a544dbc39a98"
},
{
"url": "https://git.kernel.org/stable/c/4f3a3bce428fb439c66a578adc447afce7b4a750"
},
{
"url": "https://git.kernel.org/stable/c/caa9af2e27c275e089d702cfbaaece3b42bca31b"
},
{
"url": "https://git.kernel.org/stable/c/3d75b8aa5c29058a512db29da7cbee8052724157"
}
],
"title": "KVM: Always flush async #PF workqueue when vCPU is being destroyed",
"x_generator": {
"engine": "bippy-9e1c9544281a"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-26976",
"datePublished": "2024-05-01T05:20:24.025Z",
"dateReserved": "2024-02-19T14:20:24.203Z",
"dateUpdated": "2024-11-05T09:19:15.865Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Loading...
Loading...
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.