Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2024-46864— x86/hyperv: fix kexec crash due to VP assist page corruption

EPSS 0.02% · P4
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2024-46864

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
x86/hyperv: fix kexec crash due to VP assist page corruption
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: x86/hyperv: fix kexec crash due to VP assist page corruption commit 9636be85cc5b ("x86/hyperv: Fix hyperv_pcpu_input_arg handling when CPUs go online/offline") introduces a new cpuhp state for hyperv initialization. cpuhp_setup_state() returns the state number if state is CPUHP_AP_ONLINE_DYN or CPUHP_BP_PREPARE_DYN and 0 for all other states. For the hyperv case, since a new cpuhp state was introduced it would return 0. However, in hv_machine_shutdown(), the cpuhp_remove_state() call is conditioned upon "hyperv_init_cpuhp > 0". This will never be true and so hv_cpu_die() won't be called on all CPUs. This means the VP assist page won't be reset. When the kexec kernel tries to setup the VP assist page again, the hypervisor corrupts the memory region of the old VP assist page causing a panic in case the kexec kernel is using that memory elsewhere. This was originally fixed in commit dfe94d4086e4 ("x86/hyperv: Fix kexec panic/hang issues"). Get rid of hyperv_init_cpuhp entirely since we are no longer using a dynamic cpuhp state and use CPUHP_AP_HYPERV_ONLINE directly with cpuhp_remove_state().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于VP assist页面损坏，导致程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 9636be85cc5bdd8b7a7f6a53405cbcc52161c93c ~ 2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825 -
LinuxLinux 6.4 -

II. Public POCs for CVE-2024-46864

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-46864

请登录查看更多情报信息。

Same Patch Batch · Linux · 2024-09-27 · 66 CVEs total

CVE-2024-46844um: line: always fill *error_out in setup_one_line()
CVE-2024-46865fou: fix initialization of grc
CVE-2024-46863ASoC: Intel: soc-acpi-intel-lnl-match: add missing empty item
CVE-2024-46862ASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item
CVE-2024-46852dma-buf: heaps: Fix off-by-one in CMA heap fault handler
CVE-2024-46850drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()
CVE-2024-46849ASoC: meson: axg-card: fix 'use-after-free'
CVE-2024-46848perf/x86/intel: Limit the period on Haswell
CVE-2024-46847mm: vmalloc: ensure vmap_block is initialised before adding to queue
CVE-2024-46846spi: rockchip: Resolve unbalanced runtime PM / system PM handling
CVE-2024-46851drm/amd/display: Avoid race between dcn10_set_drr() and dc_state_destruct()
CVE-2024-46845tracing/timerlat: Only clear timer if a kthread exists
CVE-2024-46843scsi: ufs: core: Remove SCSI host only if added
CVE-2024-46841btrfs: don't BUG_ON on ENOMEM from btrfs_lookup_extent_info() in walk_down_proc()
CVE-2024-46842scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info
CVE-2024-46840btrfs: clean up our handling of refs == 0 in snapshot delete
CVE-2024-46838userfaultfd: don't BUG_ON() if khugepaged yanks our page table
CVE-2024-46837drm/panthor: Restrict high priorities on group_create
CVE-2024-46835drm/amdgpu: Fix smatch static checker warning
CVE-2024-46836usb: gadget: aspeed_udc: validate endpoint index for ast udc

Showing top 20 of 66 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46864

No comments yet

Leave a comment