[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2024-40953":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":23,"related":24,"reserved_at":9,"published_at":25,"modified_at":26,"state":9,"summary":27,"references_raw":29,"kevs":36,"epss":9,"epss_history":37,"metrics":38,"affected":45},"DEBIAN-CVE-2024-40953","In the Linux kernel, the following vulnerability has been resolved:  KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()  Use {READ,WRITE}_ONCE() to access kvm->last_boosted_vcpu to ensure the loads and stores are atomic.  In the extremely unlikely scenario the compiler tears the stores, it's theoretically possible for KVM to attempt to get a vCPU using an out-of-bounds index, e.g. if the write is split into multiple 8-bit stores, and is paired with a 32-bit load on a VM with 257 vCPUs:    CPU0                              CPU1   last_boosted_vcpu = 0xff;                                      (last_boosted_vcpu = 0x100)                                     last_boosted_vcpu[15:8] = 0x01;   i = (last_boosted_vcpu = 0x1ff)                                     last_boosted_vcpu[7:0] = 0x00;    vcpu = kvm->vcpu_array[0x1ff];  As detected by KCSAN:    BUG: KCSAN: data-race in kvm_vcpu_on_spin [kvm] / kvm_vcpu_on_spin [kvm]    write to 0xffffc90025a92344 of 4 bytes by task 4340 on cpu 16:   kvm_vcpu_on_spin (arch/x86/kvm/../../../virt/kvm/kvm_main.c:4112) kvm   handle_pause (arch/x86/kvm/vmx/vmx.c:5929) kvm_intel   vmx_handle_exit (arch/x86/kvm/vmx/vmx.c:? \t\t arch/x86/kvm/vmx/vmx.c:6606) kvm_intel   vcpu_run (arch/x86/kvm/x86.c:11107 arch/x86/kvm/x86.c:11211) kvm   kvm_arch_vcpu_ioctl_run (arch/x86/kvm/x86.c:?) kvm   kvm_vcpu_ioctl (arch/x86/kvm/../../../virt/kvm/kvm_main.c:?) kvm   __se_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:904 fs/ioctl.c:890)   __x64_sys_ioctl (fs/ioctl.c:890)   x64_sys_call (arch/x86/entry/syscall_64.c:33)   do_syscall_64 (arch/x86/entry/common.c:?)   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)    read to 0xffffc90025a92344 of 4 bytes by task 4342 on cpu 4:   kvm_vcpu_on_spin (arch/x86/kvm/../../../virt/kvm/kvm_main.c:4069) kvm   handle_pause (arch/x86/kvm/vmx/vmx.c:5929) kvm_intel   vmx_handle_exit (arch/x86/kvm/vmx/vmx.c:? \t\t\tarch/x86/kvm/vmx/vmx.c:6606) kvm_intel   vcpu_run (arch/x86/kvm/x86.c:11107 arch/x86/kvm/x86.c:11211) kvm   kvm_arch_vcpu_ioctl_run (arch/x86/kvm/x86.c:?) kvm   kvm_vcpu_ioctl (arch/x86/kvm/../../../virt/kvm/kvm_main.c:?) kvm   __se_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:904 fs/ioctl.c:890)   __x64_sys_ioctl (fs/ioctl.c:890)   x64_sys_call (arch/x86/entry/syscall_64.c:33)   do_syscall_64 (arch/x86/entry/common.c:?)   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)    value changed: 0x00000012 -> 0x00000000",null,[],[],[],[14],{"_key":15},"CVE-2024-40953",[17,19,21],{"_key":18},"DLA-4008-1",{"_key":20},"DLA-4075-1",{"_key":22},"DSA-5731-1",[],[],"2024-07-12T13:15:17.560Z","2026-04-28T20:28:16.696512Z",{"cisa_kev":28,"cisa_ransomware":28,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[30],{"url":31,"sources":32,"tags":34},"https://security-tracker.debian.org/tracker/CVE-2024-40953",[33],"osv_debian",[35],"Advisory",[],[],[39],{"source":33,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":40,"cvss_v4_0":9},{"baseScore":41,"baseSeverity":9,"vectorString":42,"impactScore":43,"exploitabilityScore":44},4.7,"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",6,2.6,[46,65],{"ecosystem":47,"name":48,"vendor":49,"product":48,"cpe_part":9,"purl_type":50,"purl_namespace":49,"purl_name":48,"source":9,"versions":51},"Debian","linux","debian","deb",[52,58,61,64],{"version":53,"is_range":54,"range_type":55,"version_start":9,"version_start_type":9,"version_end":56,"version_end_type":57,"fixed_in":9},"lt5_10_234_1",true,"ecosystem","5.10.234-1","excluding",{"version":59,"is_range":54,"range_type":55,"version_start":9,"version_start_type":9,"version_end":60,"version_end_type":57,"fixed_in":9},"lt6_1_99_1","6.1.99-1",{"version":62,"is_range":54,"range_type":55,"version_start":9,"version_start_type":9,"version_end":63,"version_end_type":57,"fixed_in":9},"lt6_9_7_1","6.9.7-1",{"version":62,"is_range":54,"range_type":55,"version_start":9,"version_start_type":9,"version_end":63,"version_end_type":57,"fixed_in":9},{"ecosystem":47,"name":66,"vendor":49,"product":66,"cpe_part":9,"purl_type":50,"purl_namespace":49,"purl_name":66,"source":9,"versions":67},"linux-6.1",[68],{"version":69,"is_range":54,"range_type":55,"version_start":9,"version_start_type":9,"version_end":70,"version_end_type":57,"fixed_in":9},"lt6_1_119_1~deb11u1","6.1.119-1~deb11u1"]