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

Vulnerability from cvelistv5 – Published: 2024-09-27 12:39 – Updated: 2026-01-19 12:17
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
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)
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    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)
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      "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\"}], \"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\": \"2026-01-19T12:17:50.664Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46830\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-19T12:17:50.664Z\", \"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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Sightings

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  • 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.