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CVE-2024-46830— KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于在处理KVM_SET_VCPU_EVENTS时，未正确处理SMM模式切换。

CVSS 7.8 · High EPSS 0.24% · P15

Affected Version Matrix 17

VendorProduct Version RangeStatus
Linux Linux e302786233e6bc512986d007c96458ccf5ca21c7< 5f35099fa3d59caf10bda88b033538e90086684e affected
f7e570780efc5cec9b2ed1e0472a7da14e864fdb< fa297c33faefe51e10244e8a378837fca4963228 affected
f7e570780efc5cec9b2ed1e0472a7da14e864fdb< 939375737b5a0b1bf9b1e75129054e11bc9ca65e affected
f7e570780efc5cec9b2ed1e0472a7da14e864fdb< ecdbe8ac86fb5538ccc623a41f88ec96c7168ab9 affected
f7e570780efc5cec9b2ed1e0472a7da14e864fdb< 4bcdd831d9d01e0fb64faea50732b59b2ee88da1 affected
080dbe7e9b86a0392d8dffc00d9971792afc121f affected
b4c0d89c92e957ecccce12e66b63875d0cc7af7e affected
5.15.19< 5.15.198 affected
… +9 more rows
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I. Basic Information for CVE-2024-46830

Vulnerability Information
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Vulnerability Title
KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS Grab kvm->srcu when processing KVM_SET_VCPU_EVENTS, as KVM will forcibly leave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX reads guest memory. Note, kvm_vcpu_ioctl_x86_set_vcpu_events() can also be called from KVM_RUN via sync_regs(), which already holds SRCU. I.e. trying to precisely use kvm_vcpu_srcu_read_lock() around the problematic SMM code would cause problems. Acquiring SRCU isn't all that expensive, so for simplicity, grab it unconditionally for KVM_SET_VCPU_EVENTS. ============================= WARNING: suspicious RCU usage 6.10.0-rc7-332d2c1d713e-next-vm #552 Not tainted ----------------------------- include/linux/kvm_host.h:1027 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by repro/1071: #0: ffff88811e424430 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x7d/0x970 [kvm] stack backtrace: CPU: 15 PID: 1071 Comm: repro Not tainted 6.10.0-rc7-332d2c1d713e-next-vm #552 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Call Trace: <TASK> dump_stack_lvl+0x7f/0x90 lockdep_rcu_suspicious+0x13f/0x1a0 kvm_vcpu_gfn_to_memslot+0x168/0x190 [kvm] kvm_vcpu_read_guest+0x3e/0x90 [kvm] nested_vmx_load_msr+0x6b/0x1d0 [kvm_intel] load_vmcs12_host_state+0x432/0xb40 [kvm_intel] vmx_leave_nested+0x30/0x40 [kvm_intel] kvm_vcpu_ioctl_x86_set_vcpu_events+0x15d/0x2b0 [kvm] kvm_arch_vcpu_ioctl+0x1107/0x1750 [kvm] ? mark_held_locks+0x49/0x70 ? kvm_vcpu_ioctl+0x7d/0x970 [kvm] ? kvm_vcpu_ioctl+0x497/0x970 [kvm] kvm_vcpu_ioctl+0x497/0x970 [kvm] ? lock_acquire+0xba/0x2d0 ? find_held_lock+0x2b/0x80 ? do_user_addr_fault+0x40c/0x6f0 ? lock_release+0xb7/0x270 __x64_sys_ioctl+0x82/0xb0 do_syscall_64+0x6c/0x170 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7ff11eb1b539 </TASK>
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于在处理KVM_SET_VCPU_EVENTS时，未正确处理SMM模式切换。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux e302786233e6bc512986d007c96458ccf5ca21c7 ~ 5f35099fa3d59caf10bda88b033538e90086684e -
Linux Linux 5.17 -

II. Public POCs for CVE-2024-46830

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III. Intelligence Information for CVE-2024-46830

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Other References for CVE-2024-46830 (4)

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

CVE-2024-46865 9.8 CRITICAL fou: fix initialization of grc
CVE-2024-46831 8.4 HIGH net: microchip: vcap: Fix use-after-free error in kunit test
CVE-2024-46823 8.4 HIGH kunit/overflow: Fix UB in overflow_allocation_test
CVE-2024-46858 8.1 HIGH mptcp: pm: Fix uaf in __timer_delete_sync
CVE-2024-46862 8.0 HIGH ASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item
CVE-2024-46845 7.8 HIGH tracing/timerlat: Only clear timer if a kthread exists
CVE-2024-46813 7.8 HIGH drm/amd/display: Check link_index before accessing dc->links[]
CVE-2024-46866 7.8 HIGH drm/xe/client: add missing bo locking in show_meminfo()
CVE-2024-46812 7.8 HIGH drm/amd/display: Skip inactive planes within ModeSupportAndSystemConfiguration
CVE-2024-46816 7.8 HIGH drm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links
CVE-2024-46818 7.8 HIGH drm/amd/display: Check gpio_id before used as array index
CVE-2024-46859 7.8 HIGH platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses
CVE-2024-46852 7.8 HIGH dma-buf: heaps: Fix off-by-one in CMA heap fault handler
CVE-2024-46850 7.8 HIGH drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()
CVE-2024-46834 7.8 HIGH ethtool: fail closed if we can't get max channel used in indirection tables
CVE-2024-46847 7.8 HIGH mm: vmalloc: ensure vmap_block is initialised before adding to queue
CVE-2024-46842 7.8 HIGH scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info
CVE-2024-46803 7.8 HIGH drm/amdkfd: Check debug trap enable before write dbg_ev_file
CVE-2024-46855 7.5 HIGH netfilter: nft_socket: fix sk refcount leaks
CVE-2024-46817 7.4 HIGH drm/amd/display: Stop amdgpu_dm initialize when stream nums greater than 6

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46830

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