{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-21779", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.764Z", "datePublished": "2025-02-27T02:18:23.001Z", "dateUpdated": "2026-05-11T21:06:16.051Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:06:16.051Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel\n\nAdvertise support for Hyper-V's SEND_IPI and SEND_IPI_EX hypercalls if and\nonly if the local API is emulated/virtualized by KVM, and explicitly reject\nsaid hypercalls if the local APIC is emulated in userspace, i.e. don't rely\non userspace to opt-in to KVM_CAP_HYPERV_ENFORCE_CPUID.\n\nRejecting SEND_IPI and SEND_IPI_EX fixes a NULL-pointer dereference if\nHyper-V enlightenments are exposed to the guest without an in-kernel local\nAPIC:\n\n dump_stack+0xbe/0xfd\n __kasan_report.cold+0x34/0x84\n kasan_report+0x3a/0x50\n __apic_accept_irq+0x3a/0x5c0\n kvm_hv_send_ipi.isra.0+0x34e/0x820\n kvm_hv_hypercall+0x8d9/0x9d0\n kvm_emulate_hypercall+0x506/0x7e0\n __vmx_handle_exit+0x283/0xb60\n vmx_handle_exit+0x1d/0xd0\n vcpu_enter_guest+0x16b0/0x24c0\n vcpu_run+0xc0/0x550\n kvm_arch_vcpu_ioctl_run+0x170/0x6d0\n kvm_vcpu_ioctl+0x413/0xb20\n __se_sys_ioctl+0x111/0x160\n do_syscal1_64+0x30/0x40\n entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nNote, checking the sending vCPU is sufficient, as the per-VM irqchip_mode\ncan't be modified after vCPUs are created, i.e. if one vCPU has an\nin-kernel local APIC, then all vCPUs have an in-kernel local APIC." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/x86/kvm/hyperv.c" ], "versions": [ { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "61224533f2b61e252b03e214195d27d64b22989a", "status": "affected", "versionType": "git" }, { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "45fa526b0f5a34492ed0536c3cdf88b78380e4de", "status": "affected", "versionType": "git" }, { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "5393cf22312418262679eaadb130d608c75fe690", "status": "affected", "versionType": "git" }, { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "874ff13c73c45ecb38cb82191e8c1d523f0dc81b", "status": "affected", "versionType": "git" }, { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "aca8be4403fb90db7adaf63830e27ebe787a76e8", "status": "affected", "versionType": "git" }, { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "ca29f58ca374c40a0e69c5306fc5c940a0069074", "status": "affected", "versionType": "git" }, { "version": "214ff83d4473a7757fa18a64dc7efe3b0e158486", "lessThan": "a8de7f100bb5989d9c3627d3a223ee1c863f3b69", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/x86/kvm/hyperv.c" ], "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.236", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.179", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.129", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.79", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.16", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.4", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.10.236" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.179" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1.129" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.6.79" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.12.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.13.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/61224533f2b61e252b03e214195d27d64b22989a" }, { "url": "https://git.kernel.org/stable/c/45fa526b0f5a34492ed0536c3cdf88b78380e4de" }, { "url": "https://git.kernel.org/stable/c/5393cf22312418262679eaadb130d608c75fe690" }, { "url": "https://git.kernel.org/stable/c/874ff13c73c45ecb38cb82191e8c1d523f0dc81b" }, { "url": "https://git.kernel.org/stable/c/aca8be4403fb90db7adaf63830e27ebe787a76e8" }, { "url": "https://git.kernel.org/stable/c/ca29f58ca374c40a0e69c5306fc5c940a0069074" }, { "url": "https://git.kernel.org/stable/c/a8de7f100bb5989d9c3627d3a223ee1c863f3b69" } ], "title": "KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:59:24.679Z" } } ] } }