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CVE-2024-46830 (GCVE-0-2024-46830)

Vulnerability from cvelistv5 – Published: 2024-09-27 12:39 – Updated: 2026-08-05 11:38
VLAI
Title
KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS
Summary
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>
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:12 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e302786233e6bc512986d007c96458ccf5ca21c7 , < 5f35099fa3d59caf10bda88b033538e90086684e (git)
Affected: f7e570780efc5cec9b2ed1e0472a7da14e864fdb , < fa297c33faefe51e10244e8a378837fca4963228 (git)
Affected: f7e570780efc5cec9b2ed1e0472a7da14e864fdb , < 939375737b5a0b1bf9b1e75129054e11bc9ca65e (git)
Affected: f7e570780efc5cec9b2ed1e0472a7da14e864fdb , < ecdbe8ac86fb5538ccc623a41f88ec96c7168ab9 (git)
Affected: f7e570780efc5cec9b2ed1e0472a7da14e864fdb , < 4bcdd831d9d01e0fb64faea50732b59b2ee88da1 (git)
Affected: 080dbe7e9b86a0392d8dffc00d9971792afc121f (git)
Affected: b4c0d89c92e957ecccce12e66b63875d0cc7af7e (git)
Affected: 5.15.19 , < 5.15.198 (semver)
Affected: 5.10.97 , < 5.11 (semver)
Affected: 5.16.5 , < 5.17 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.110 , ≤ 6.1.* (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Acquire kvm-\u003esrcu when handling KVM_SET_VCPU_EVENTS\n\nGrab kvm-\u003esrcu when processing KVM_SET_VCPU_EVENTS, as KVM will forcibly\nleave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX\nreads guest memory.\n\nNote, kvm_vcpu_ioctl_x86_set_vcpu_events() can also be called from KVM_RUN\nvia sync_regs(), which already holds SRCU.  I.e. trying to precisely use\nkvm_vcpu_srcu_read_lock() around the problematic SMM code would cause\nproblems.  Acquiring SRCU isn\u0027t all that expensive, so for simplicity,\ngrab it unconditionally for KVM_SET_VCPU_EVENTS.\n\n =============================\n WARNING: suspicious RCU usage\n 6.10.0-rc7-332d2c1d713e-next-vm #552 Not tainted\n -----------------------------\n include/linux/kvm_host.h:1027 suspicious rcu_dereference_check() usage!\n\n other info that might help us debug this:\n\n rcu_scheduler_active = 2, debug_locks = 1\n 1 lock held by repro/1071:\n  #0: ffff88811e424430 (\u0026vcpu-\u003emutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x7d/0x970 [kvm]\n\n stack backtrace:\n CPU: 15 PID: 1071 Comm: repro Not tainted 6.10.0-rc7-332d2c1d713e-next-vm #552\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x7f/0x90\n  lockdep_rcu_suspicious+0x13f/0x1a0\n  kvm_vcpu_gfn_to_memslot+0x168/0x190 [kvm]\n  kvm_vcpu_read_guest+0x3e/0x90 [kvm]\n  nested_vmx_load_msr+0x6b/0x1d0 [kvm_intel]\n  load_vmcs12_host_state+0x432/0xb40 [kvm_intel]\n  vmx_leave_nested+0x30/0x40 [kvm_intel]\n  kvm_vcpu_ioctl_x86_set_vcpu_events+0x15d/0x2b0 [kvm]\n  kvm_arch_vcpu_ioctl+0x1107/0x1750 [kvm]\n  ? mark_held_locks+0x49/0x70\n  ? kvm_vcpu_ioctl+0x7d/0x970 [kvm]\n  ? kvm_vcpu_ioctl+0x497/0x970 [kvm]\n  kvm_vcpu_ioctl+0x497/0x970 [kvm]\n  ? lock_acquire+0xba/0x2d0\n  ? find_held_lock+0x2b/0x80\n  ? do_user_addr_fault+0x40c/0x6f0\n  ? lock_release+0xb7/0x270\n  __x64_sys_ioctl+0x82/0xb0\n  do_syscall_64+0x6c/0x170\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n RIP: 0033:0x7ff11eb1b539\n  \u003c/TASK\u003e"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached solely through ioctls on a KVM vCPU file descriptor (`KVM_SET_NESTED_STATE` then `KVM_SET_VCPU_EVENTS`), racing against `KVM_SET_USER_MEMORY_REGION` on the VM fd. This requires local access to /dev/kvm with no network component.\nAC:L - The attacker owns both sides of the race \u2014 one thread toggles SMM via KVM_SET_VCPU_EVENTS while another deletes/moves memslots \u2014 and the two paths take disjoint locks (vcpu-\u003emutex vs kvm-\u003eslots_lock). Because the unprotected read is a __copy_from_user() on the attacker\u0027s own guest mapping, userfaultfd/FUSE backing can stall the reader inside the window indefinitely, making the race deterministically winnable.\nPR:L - Only an open /dev/kvm descriptor is needed, which systemd\u0027s default udev rule grants world read/write (MODE=0666), and nested-virt CI runners, cloud images, and Android AVF routinely expose KVM to unprivileged users. No CAP_SYS_ADMIN or real root is required.\nUI:N - The attacker\u0027s own process performs every step \u2014 creating the VM, stuffing nested state, toggling SMM, and cycling memslots. No action by any other user is involved.\nS:U - The attacker is already host userspace and the impact is on the host kernel, so no security boundary is crossed; this is not a guest-to-host escape since guest-initiated SMM transitions go through KVM_RUN, which already holds SRCU. Vulnerable and impacted components share the same security authority.\nC:H - The missing SRCU read lock yields a use-after-free read of a kfree()\u0027d struct kvm_memory_slot and of rbtree nodes in search_memslots(), and a reallocated slot gives the attacker control of userspace_addr/base_gfn/npages plus arch.rmap pointers. This permits reading memory of deleted regions and, via heap grooming, arbitrary kernel-memory disclosure.\nI:H - A freed slot that is reallocated with attacker-groomed contents is used to compute host addresses and is consumed by KVM\u0027s MMU and nested_vmx_load_msr(), and the concurrently-mutated rbtree traversal writes back into slots-\u003elast_used_slot. This gives the corruption-and-control-flow primitives characteristic of an exploitable heap UAF.\nA:H - Dereferencing freed memslot objects and walking an rbtree whose nodes are being freed under the reader reliably produces wild-pointer dereferences, oopses, and kernel panics. Any local user with /dev/kvm can trigger this in a loop to crash the host."
            }
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        "dateUpdated": "2026-08-05T11:38:52.433Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5f35099fa3d59caf10bda88b033538e90086684e"
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        {
          "url": "https://git.kernel.org/stable/c/fa297c33faefe51e10244e8a378837fca4963228"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4bcdd831d9d01e0fb64faea50732b59b2ee88da1"
        }
      ],
      "title": "KVM: x86: Acquire kvm-\u003esrcu when handling KVM_SET_VCPU_EVENTS",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46830",
    "datePublished": "2024-09-27T12:39:28.396Z",
    "dateReserved": "2024-09-11T15:12:18.286Z",
    "dateUpdated": "2026-08-05T11:38:52.433Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-46830",
      "date": "2026-09-11",
      "epss": "0.00247",
      "percentile": "0.15999"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46830\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-27T13:15:15.380\",\"lastModified\":\"2026-08-04T11:20:30.960\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: x86: Acquire kvm-\u003esrcu when handling KVM_SET_VCPU_EVENTS\\n\\nGrab kvm-\u003esrcu when processing KVM_SET_VCPU_EVENTS, as KVM will forcibly\\nleave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX\\nreads guest memory.\\n\\nNote, kvm_vcpu_ioctl_x86_set_vcpu_events() can also be called from KVM_RUN\\nvia sync_regs(), which already holds SRCU.  I.e. trying to precisely use\\nkvm_vcpu_srcu_read_lock() around the problematic SMM code would cause\\nproblems.  Acquiring SRCU isn\u0027t all that expensive, so for simplicity,\\ngrab it unconditionally for KVM_SET_VCPU_EVENTS.\\n\\n =============================\\n WARNING: suspicious RCU usage\\n 6.10.0-rc7-332d2c1d713e-next-vm #552 Not tainted\\n -----------------------------\\n include/linux/kvm_host.h:1027 suspicious rcu_dereference_check() usage!\\n\\n other info that might help us debug this:\\n\\n rcu_scheduler_active = 2, debug_locks = 1\\n 1 lock held by repro/1071:\\n  #0: ffff88811e424430 (\u0026vcpu-\u003emutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x7d/0x970 [kvm]\\n\\n stack backtrace:\\n CPU: 15 PID: 1071 Comm: repro Not tainted 6.10.0-rc7-332d2c1d713e-next-vm #552\\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0x7f/0x90\\n  lockdep_rcu_suspicious+0x13f/0x1a0\\n  kvm_vcpu_gfn_to_memslot+0x168/0x190 [kvm]\\n  kvm_vcpu_read_guest+0x3e/0x90 [kvm]\\n  nested_vmx_load_msr+0x6b/0x1d0 [kvm_intel]\\n  load_vmcs12_host_state+0x432/0xb40 [kvm_intel]\\n  vmx_leave_nested+0x30/0x40 [kvm_intel]\\n  kvm_vcpu_ioctl_x86_set_vcpu_events+0x15d/0x2b0 [kvm]\\n  kvm_arch_vcpu_ioctl+0x1107/0x1750 [kvm]\\n  ? mark_held_locks+0x49/0x70\\n  ? kvm_vcpu_ioctl+0x7d/0x970 [kvm]\\n  ? kvm_vcpu_ioctl+0x497/0x970 [kvm]\\n  kvm_vcpu_ioctl+0x497/0x970 [kvm]\\n  ? lock_acquire+0xba/0x2d0\\n  ? find_held_lock+0x2b/0x80\\n  ? do_user_addr_fault+0x40c/0x6f0\\n  ? lock_release+0xb7/0x270\\n  __x64_sys_ioctl+0x82/0xb0\\n  do_syscall_64+0x6c/0x170\\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\\n RIP: 0033:0x7ff11eb1b539\\n  \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: x86: Adquirir kvm-\u0026gt;srcu al manejar KVM_SET_VCPU_EVENTS Adquiera kvm-\u0026gt;srcu al procesar KVM_SET_VCPU_EVENTS, ya que KVM abandonar\u00e1 a la fuerza el VMX/SVM anidado si se alterna el modo SMM, y al abandonar el VMX anidado se lee la memoria del invitado. Tenga en cuenta que kvm_vcpu_ioctl_x86_set_vcpu_events() tambi\u00e9n se puede llamar desde KVM_RUN a trav\u00e9s de sync_regs(), que ya contiene SRCU. Es decir, intentar usar con precisi\u00f3n kvm_vcpu_srcu_read_lock() alrededor del c\u00f3digo SMM problem\u00e1tico causar\u00eda problemas. Adquirir SRCU no es tan caro, as\u00ed que para simplificar, t\u00f3melo incondicionalmente para KVM_SET_VCPU_EVENTS. ============================= ADVERTENCIA: uso sospechoso de RCU 6.10.0-rc7-332d2c1d713e-next-vm #552 No contaminado ----------------------------- include/linux/kvm_host.h:1027 \u00a1Uso sospechoso de rcu_dereference_check()! Otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto: rcu_scheduler_active = 2, debug_locks = 1 1 bloqueo retenido por repro/1071: #0: ffff88811e424430 (\u0026amp;vcpu-\u0026gt;mutex){+.+.}-{3:3}, en: kvm_vcpu_ioctl+0x7d/0x970 [kvm] seguimiento de pila: CPU: 15 PID: 1071 Comm: repro No contaminado 6.10.0-rc7-332d2c1d713e-next-vm #552 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Seguimiento de llamadas:  dump_stack_lvl+0x7f/0x90 kvm_vcpu_ioctl_x86_set_vcpu_events+0x15d/0x2b0 [kvm] kvm_arch_vcpu_ioctl+0x1107/0x1750 [kvm] ? kvm_vcpu_ioctl+0x497/0x970 [kvm] kvm_vcpu_ioctl+0x497/0x970 [kvm] ? bloqueo_adquirir+0xba/0x2d0 ? encontrar_bloqueo_retenido+0x2b/0x80 ? hacer_error_direcci\u00f3n_usuario+0x40c/0x6f0 ? liberaci\u00f3n_de_bloqueo+0xb7/0x270 __x64_sys_ioctl+0x82/0xb0 hacer_llamada_al_sistema_64+0x6c/0x170 entrada_SYSCALL_64_despu\u00e9s_de_hwframe+0x4b/0x53 RIP: 0033:0x7ff11eb1b539 \"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/x86/kvm/x86.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e302786233e6bc512986d007c96458ccf5ca21c7\",\"lessThan\":\"5f35099fa3d59caf10bda88b033538e90086684e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\",\"lessThan\":\"fa297c33faefe51e10244e8a378837fca4963228\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\",\"lessThan\":\"939375737b5a0b1bf9b1e75129054e11bc9ca65e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\",\"lessThan\":\"ecdbe8ac86fb5538ccc623a41f88ec96c7168ab9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\",\"lessThan\":\"4bcdd831d9d01e0fb64faea50732b59b2ee88da1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"080dbe7e9b86a0392d8dffc00d9971792afc121f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b4c0d89c92e957ecccce12e66b63875d0cc7af7e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.15.19\",\"lessThan\":\"5.15.198\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.97\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.16.5\",\"lessThan\":\"5.17\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/x86/kvm/x86.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.198\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.110\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.51\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10.10\",\"lessThanOrEqual\":\"6.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-29T14:12:09.375859Z\",\"id\":\"CVE-2024-46830\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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List\",\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T18:02:59+00:00",
      "cve": "CVE-2024-46830",
      "id": "CVE-2024-46830",
      "initial_release_date": "2024-09-27T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: KVM: x86: Acquire kvm-\u0026gt;srcu when handling KVM_SET_VCPU_EVENTS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-46830.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:19:21.236Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-46830\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-29T14:12:09.375859Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-29T14:12:10.454Z\"}}], \"cna\": {\"title\": \"KVM: x86: Acquire kvm-\u003esrcu when handling KVM_SET_VCPU_EVENTS\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e302786233e6bc512986d007c96458ccf5ca21c7\", \"lessThan\": \"5f35099fa3d59caf10bda88b033538e90086684e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\", \"lessThan\": \"fa297c33faefe51e10244e8a378837fca4963228\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\", \"lessThan\": \"939375737b5a0b1bf9b1e75129054e11bc9ca65e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\", \"lessThan\": \"ecdbe8ac86fb5538ccc623a41f88ec96c7168ab9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f7e570780efc5cec9b2ed1e0472a7da14e864fdb\", \"lessThan\": \"4bcdd831d9d01e0fb64faea50732b59b2ee88da1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"080dbe7e9b86a0392d8dffc00d9971792afc121f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b4c0d89c92e957ecccce12e66b63875d0cc7af7e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5.15.19\", \"lessThan\": \"5.15.198\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.10.97\", \"lessThan\": \"5.11\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.16.5\", \"lessThan\": \"5.17\", \"versionType\": \"semver\"}], \"programFiles\": [\"arch/x86/kvm/x86.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.110\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.51\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"arch/x86/kvm/x86.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5f35099fa3d59caf10bda88b033538e90086684e\"}, {\"url\": \"https://git.kernel.org/stable/c/fa297c33faefe51e10244e8a378837fca4963228\"}, {\"url\": \"https://git.kernel.org/stable/c/939375737b5a0b1bf9b1e75129054e11bc9ca65e\"}, {\"url\": \"https://git.kernel.org/stable/c/ecdbe8ac86fb5538ccc623a41f88ec96c7168ab9\"}, {\"url\": \"https://git.kernel.org/stable/c/4bcdd831d9d01e0fb64faea50732b59b2ee88da1\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: x86: Acquire kvm-\u003esrcu when handling KVM_SET_VCPU_EVENTS\\n\\nGrab kvm-\u003esrcu when processing KVM_SET_VCPU_EVENTS, as KVM will forcibly\\nleave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX\\nreads guest memory.\\n\\nNote, kvm_vcpu_ioctl_x86_set_vcpu_events() can also be called from KVM_RUN\\nvia sync_regs(), which already holds SRCU.  I.e. trying to precisely use\\nkvm_vcpu_srcu_read_lock() around the problematic SMM code would cause\\nproblems.  Acquiring SRCU isn\u0027t all that expensive, so for simplicity,\\ngrab it unconditionally for KVM_SET_VCPU_EVENTS.\\n\\n =============================\\n WARNING: suspicious RCU usage\\n 6.10.0-rc7-332d2c1d713e-next-vm #552 Not tainted\\n -----------------------------\\n include/linux/kvm_host.h:1027 suspicious rcu_dereference_check() usage!\\n\\n other info that might help us debug this:\\n\\n rcu_scheduler_active = 2, debug_locks = 1\\n 1 lock held by repro/1071:\\n  #0: ffff88811e424430 (\u0026vcpu-\u003emutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x7d/0x970 [kvm]\\n\\n stack backtrace:\\n CPU: 15 PID: 1071 Comm: repro Not tainted 6.10.0-rc7-332d2c1d713e-next-vm #552\\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0x7f/0x90\\n  lockdep_rcu_suspicious+0x13f/0x1a0\\n  kvm_vcpu_gfn_to_memslot+0x168/0x190 [kvm]\\n  kvm_vcpu_read_guest+0x3e/0x90 [kvm]\\n  nested_vmx_load_msr+0x6b/0x1d0 [kvm_intel]\\n  load_vmcs12_host_state+0x432/0xb40 [kvm_intel]\\n  vmx_leave_nested+0x30/0x40 [kvm_intel]\\n  kvm_vcpu_ioctl_x86_set_vcpu_events+0x15d/0x2b0 [kvm]\\n  kvm_arch_vcpu_ioctl+0x1107/0x1750 [kvm]\\n  ? mark_held_locks+0x49/0x70\\n  ? kvm_vcpu_ioctl+0x7d/0x970 [kvm]\\n  ? kvm_vcpu_ioctl+0x497/0x970 [kvm]\\n  kvm_vcpu_ioctl+0x497/0x970 [kvm]\\n  ? lock_acquire+0xba/0x2d0\\n  ? find_held_lock+0x2b/0x80\\n  ? do_user_addr_fault+0x40c/0x6f0\\n  ? lock_release+0xb7/0x270\\n  __x64_sys_ioctl+0x82/0xb0\\n  do_syscall_64+0x6c/0x170\\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\\n RIP: 0033:0x7ff11eb1b539\\n  \u003c/TASK\u003e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"5.15.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.110\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.51\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.10\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.10.97\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.16.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:53:35.775Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46830\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:53:35.775Z\", \"dateReserved\": \"2024-09-11T15:12:18.286Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-27T12:39:28.396Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.