227 lines
12 KiB
JSON
227 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-40102",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-04-16T07:20:57.164Z",
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"datePublished": "2025-10-30T09:48:07.790Z",
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"dateUpdated": "2026-09-02T12:49:25.880Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-09-02T12:49:25.880Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Prevent access to vCPU events before init\n\nAnother day, another syzkaller bug. KVM erroneously allows userspace to\npend vCPU events for a vCPU that hasn't been initialized yet, leading to\nKVM interpreting a bunch of uninitialized garbage for routing /\ninjecting the exception.\n\nIn one case the injection code and the hyp disagree on whether the vCPU\nhas a 32bit EL1 and put the vCPU into an illegal mode for AArch64,\ntripping the BUG() in exception_target_el() during the next injection:\n\n kernel BUG at arch/arm64/kvm/inject_fault.c:40!\n Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n CPU: 3 UID: 0 PID: 318 Comm: repro Not tainted 6.17.0-rc4-00104-g10fd0285305d #6 PREEMPT\n Hardware name: linux,dummy-virt (DT)\n pstate: 21402009 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n pc : exception_target_el+0x88/0x8c\n lr : pend_serror_exception+0x18/0x13c\n sp : ffff800082f03a10\n x29: ffff800082f03a10 x28: ffff0000cb132280 x27: 0000000000000000\n x26: 0000000000000000 x25: ffff0000c2a99c20 x24: 0000000000000000\n x23: 0000000000008000 x22: 0000000000000002 x21: 0000000000000004\n x20: 0000000000008000 x19: ffff0000c2a99c20 x18: 0000000000000000\n x17: 0000000000000000 x16: 0000000000000000 x15: 00000000200000c0\n x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000\n x8 : ffff800082f03af8 x7 : 0000000000000000 x6 : 0000000000000000\n x5 : ffff800080f621f0 x4 : 0000000000000000 x3 : 0000000000000000\n x2 : 000000000040009b x1 : 0000000000000003 x0 : ffff0000c2a99c20\n Call trace:\n exception_target_el+0x88/0x8c (P)\n kvm_inject_serror_esr+0x40/0x3b4\n __kvm_arm_vcpu_set_events+0xf0/0x100\n kvm_arch_vcpu_ioctl+0x180/0x9d4\n kvm_vcpu_ioctl+0x60c/0x9f4\n __arm64_sys_ioctl+0xac/0x104\n invoke_syscall+0x48/0x110\n el0_svc_common.constprop.0+0x40/0xe0\n do_el0_svc+0x1c/0x28\n el0_svc+0x34/0xf0\n el0t_64_sync_handler+0xa0/0xe4\n el0t_64_sync+0x198/0x19c\n Code: f946bc01 b4fffe61 9101e020 17fffff2 (d4210000)\n\nReject the ioctls outright as no sane VMM would call these before\nKVM_ARM_VCPU_INIT anyway. Even if it did the exception would've been\nthrown away by the eventual reset of the vCPU's state."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/kvm/arm.c"
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],
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"versions": [
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "b0ab34a9e4cd5b88b522cc156e792cefe3085334",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "d64461d38972302f0243498ff409b0d54e14e106",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "b498f0da45a388b40195f7198455c62fe366a372",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "7b854e68365a84dfa984ee81268e10b9311ac9d2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "c0fcd72e7eb50205dc20731033b0b1c67ecbe4dc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "64a04e6320fc5affbadc59dc7024d79f909bfe84",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b7b27facc7b50a5fce0afaa3df56157136ce181a",
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"lessThan": "0aa1b76fe1429629215a7c79820e4b96233ac4a3",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/kvm/arm.c"
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],
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"versions": [
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{
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"version": "4.19",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.19",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.269",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.220",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.187",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.156",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.108",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17.5",
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"lessThanOrEqual": "6.17.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "5.10.269"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "5.15.220"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.1.187"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.6.156"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.12.108"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.17.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.18"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b0ab34a9e4cd5b88b522cc156e792cefe3085334"
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},
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{
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"url": "https://git.kernel.org/stable/c/d64461d38972302f0243498ff409b0d54e14e106"
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},
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{
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"url": "https://git.kernel.org/stable/c/b498f0da45a388b40195f7198455c62fe366a372"
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},
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{
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"url": "https://git.kernel.org/stable/c/7b854e68365a84dfa984ee81268e10b9311ac9d2"
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},
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{
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"url": "https://git.kernel.org/stable/c/c0fcd72e7eb50205dc20731033b0b1c67ecbe4dc"
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},
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{
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"url": "https://git.kernel.org/stable/c/64a04e6320fc5affbadc59dc7024d79f909bfe84"
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},
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{
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"url": "https://git.kernel.org/stable/c/0aa1b76fe1429629215a7c79820e4b96233ac4a3"
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}
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],
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"title": "KVM: arm64: Prevent access to vCPU events before init",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |