201 lines
12 KiB
JSON
201 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-2022-49154",
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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": "2025-02-26T01:49:39.275Z",
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"datePublished": "2025-02-26T01:55:19.245Z",
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"dateUpdated": "2026-08-05T08:54:05.900Z"
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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": "2026-08-05T08:54:05.900Z"
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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: SVM: fix panic on out-of-bounds guest IRQ\n\nAs guest_irq is coming from KVM_IRQFD API call, it may trigger\ncrash in svm_update_pi_irte() due to out-of-bounds:\n\ncrash> bt\nPID: 22218 TASK: ffff951a6ad74980 CPU: 73 COMMAND: \"vcpu8\"\n #0 [ffffb1ba6707fa40] machine_kexec at ffffffff8565b397\n #1 [ffffb1ba6707fa90] __crash_kexec at ffffffff85788a6d\n #2 [ffffb1ba6707fb58] crash_kexec at ffffffff8578995d\n #3 [ffffb1ba6707fb70] oops_end at ffffffff85623c0d\n #4 [ffffb1ba6707fb90] no_context at ffffffff856692c9\n #5 [ffffb1ba6707fbf8] exc_page_fault at ffffffff85f95b51\n #6 [ffffb1ba6707fc50] asm_exc_page_fault at ffffffff86000ace\n [exception RIP: svm_update_pi_irte+227]\n RIP: ffffffffc0761b53 RSP: ffffb1ba6707fd08 RFLAGS: 00010086\n RAX: ffffb1ba6707fd78 RBX: ffffb1ba66d91000 RCX: 0000000000000001\n RDX: 00003c803f63f1c0 RSI: 000000000000019a RDI: ffffb1ba66db2ab8\n RBP: 000000000000019a R8: 0000000000000040 R9: ffff94ca41b82200\n R10: ffffffffffffffcf R11: 0000000000000001 R12: 0000000000000001\n R13: 0000000000000001 R14: ffffffffffffffcf R15: 000000000000005f\n ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\n #7 [ffffb1ba6707fdb8] kvm_irq_routing_update at ffffffffc09f19a1 [kvm]\n #8 [ffffb1ba6707fde0] kvm_set_irq_routing at ffffffffc09f2133 [kvm]\n #9 [ffffb1ba6707fe18] kvm_vm_ioctl at ffffffffc09ef544 [kvm]\n RIP: 00007f143c36488b RSP: 00007f143a4e04b8 RFLAGS: 00000246\n RAX: ffffffffffffffda RBX: 00007f05780041d0 RCX: 00007f143c36488b\n RDX: 00007f05780041d0 RSI: 000000004008ae6a RDI: 0000000000000020\n RBP: 00000000000004e8 R8: 0000000000000008 R9: 00007f05780041e0\n R10: 00007f0578004560 R11: 0000000000000246 R12: 00000000000004e0\n R13: 000000000000001a R14: 00007f1424001c60 R15: 00007f0578003bc0\n ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b\n\nVmx have been fix this in commit 3a8b0677fc61 (KVM: VMX: Do not BUG() on\nout-of-bounds guest IRQ), so we can just copy source from that to fix\nthis."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is reached only through local KVM VM ioctls (KVM_IRQFD / KVM_SET_GSI_ROUTING → kvm_irq_routing_update → avic_pi_update_irte) on /dev/kvm; it does not process network packets or remote protocol data.\nAC:L - An attacker who can open /dev/kvm fully controls the GSI/irqfd values and routing-update sequence and can deterministically force guest_irq >= nr_rt_entries on AMD hosts with IRQ posting; no race or attacker-uncontrollable layout is required for the crash path.\nPR:L - /dev/kvm is mode 0660 group kvm (with uaccess); unprivileged users in the kvm group—or cloud tenants running QEMU with VFIO passthrough—can exercise the path without real init-namespace root, matching the related CVE-2017-1000252 PR:L assessment.\nUI:N - The attacker triggers the fault entirely with their own KVM ioctls; no separate victim mount, open, or other interactive action is required.\nS:U - This is a host-userspace VMM ioctl hitting the host kernel, not a guest-to-host escape; impact stays in the same OS/kernel authority (standard local kernel DoS/corruption), unlike a true KVM VM-escape Scope Changed case.\nC:H - WARN_ON does not stop execution, so an attacker-chosen guest_irq performs an unbounded out-of-bounds read of irq_rt->map[] heap memory as an hlist_head and may walk/treat adjacent objects as kvm_kernel_irq_routing_entry structures, which per guidance is High confidentiality impact.\nI:H - A successful forged-entry walk can drive irq_set_vcpu_affinity and svm_ir_list_add/del on attacker-influenced routing/IOMMU state (type confusion / list mutation from OOB-derived pointers), which is High integrity impact under the overestimate rule.\nA:H - The documented failure is an exc_page_fault / machine check path through svm_update_pi_irte leading to oops/panic (and host hang in the related VMX BUG_ON case), which is full availability impact and can be retried."
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}
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]
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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/x86/kvm/svm/avic.c"
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],
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"versions": [
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{
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"version": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb",
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"lessThan": "0fb470eb48892e131d10aa3be6915239e65758f3",
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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": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb",
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"lessThan": "3fa2d747960521a646fc1aad7aea82e95e139a68",
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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": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb",
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"lessThan": "e4d153d53d9648513481eb4ef8c212e7f1f8173d",
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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": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb",
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"lessThan": "a6ffdebfb6a9c2ffeed902b544b96fe67498210e",
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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": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb",
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"lessThan": "a80ced6ea514000d34bf1239d47553de0d1ee89e",
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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/x86/kvm/svm/avic.c"
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],
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"versions": [
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{
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"version": "4.9",
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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": "4.9",
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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": "5.10.110",
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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": "5.15.33",
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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": "5.16.19",
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"lessThanOrEqual": "5.16.*",
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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": "5.17.2",
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"lessThanOrEqual": "5.17.*",
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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": "5.18",
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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": "4.9",
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"versionEndExcluding": "5.10.110"
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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": "4.9",
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"versionEndExcluding": "5.15.33"
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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": "4.9",
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"versionEndExcluding": "5.16.19"
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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": "4.9",
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"versionEndExcluding": "5.17.2"
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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": "4.9",
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"versionEndExcluding": "5.18"
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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/0fb470eb48892e131d10aa3be6915239e65758f3"
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},
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{
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"url": "https://git.kernel.org/stable/c/3fa2d747960521a646fc1aad7aea82e95e139a68"
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},
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{
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"url": "https://git.kernel.org/stable/c/e4d153d53d9648513481eb4ef8c212e7f1f8173d"
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},
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{
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"url": "https://git.kernel.org/stable/c/a6ffdebfb6a9c2ffeed902b544b96fe67498210e"
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},
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{
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"url": "https://git.kernel.org/stable/c/a80ced6ea514000d34bf1239d47553de0d1ee89e"
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}
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],
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"title": "KVM: SVM: fix panic on out-of-bounds guest IRQ",
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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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} |