ghsa-9jpw-f586-mqqf
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails
Check for a valid hv_vp_index array prior to derefencing hv_vp_index when setting Hyper-V's TSC change callback. If Hyper-V setup failed in hyperv_init(), the kernel will still report that it's running under Hyper-V, but will have silently disabled nearly all functionality.
BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:set_hv_tscchange_cb+0x15/0xa0 Code: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08 ... Call Trace: kvm_arch_init+0x17c/0x280 kvm_init+0x31/0x330 vmx_init+0xba/0x13a do_one_initcall+0x41/0x1c0 kernel_init_freeable+0x1f2/0x23b kernel_init+0x16/0x120 ret_from_fork+0x22/0x30
{
"affected": [],
"aliases": [
"CVE-2021-47217"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-10T19:15:48Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails\n\nCheck for a valid hv_vp_index array prior to derefencing hv_vp_index when\nsetting Hyper-V\u0027s TSC change callback. If Hyper-V setup failed in\nhyperv_init(), the kernel will still report that it\u0027s running under\nHyper-V, but will have silently disabled nearly all functionality.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] SMP\n CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:set_hv_tscchange_cb+0x15/0xa0\n Code: \u003c8b\u003e 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08\n ...\n Call Trace:\n kvm_arch_init+0x17c/0x280\n kvm_init+0x31/0x330\n vmx_init+0xba/0x13a\n do_one_initcall+0x41/0x1c0\n kernel_init_freeable+0x1f2/0x23b\n kernel_init+0x16/0x120\n ret_from_fork+0x22/0x30",
"id": "GHSA-9jpw-f586-mqqf",
"modified": "2024-04-10T21:30:32Z",
"published": "2024-04-10T21:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47217"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- 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.