{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-46830", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-46830", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-09-27T12:39:28.396Z", "updatedAt": "2026-08-05T11:38:52.433Z", "importedAt": "2026-10-24T01:57:16.009Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS\n\nGrab kvm->srcu 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't 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 (&vcpu->mutex){+.+.}-{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 \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 ", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e302786233e6bc512986d007c96458ccf5ca21c7", "status": "affected", "versionType": "git", "lessThan": "5f35099fa3d59caf10bda88b033538e90086684e" }, { "version": "f7e570780efc5cec9b2ed1e0472a7da14e864fdb", "status": "affected", "versionType": "git", "lessThan": "fa297c33faefe51e10244e8a378837fca4963228" }, { "version": "f7e570780efc5cec9b2ed1e0472a7da14e864fdb", "status": "affected", "versionType": "git", "lessThan": "939375737b5a0b1bf9b1e75129054e11bc9ca65e" }, { "version": "f7e570780efc5cec9b2ed1e0472a7da14e864fdb", "status": "affected", "versionType": "git", "lessThan": "ecdbe8ac86fb5538ccc623a41f88ec96c7168ab9" }, { "version": "f7e570780efc5cec9b2ed1e0472a7da14e864fdb", "status": "affected", "versionType": "git", "lessThan": "4bcdd831d9d01e0fb64faea50732b59b2ee88da1" }, { "version": "080dbe7e9b86a0392d8dffc00d9971792afc121f", "status": "affected", "versionType": "git" }, { "version": "b4c0d89c92e957ecccce12e66b63875d0cc7af7e", "status": "affected", "versionType": "git" }, { "version": "5.15.19", "status": "affected", "versionType": "semver", "lessThan": "5.15.198" }, { "version": "5.10.97", "status": "affected", "versionType": "semver", "lessThan": "5.11" }, { "version": "5.16.5", "status": "affected", "versionType": "semver", "lessThan": "5.17" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.17", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.17" }, { "version": "5.15.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.51", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.10.10", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.10.*" }, { "version": "6.11", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }