{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49154", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.275Z", "datePublished": "2025-02-26T01:55:19.245Z", "dateUpdated": "2026-08-05T08:54:05.900Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:05.900Z" }, "descriptions": [ { "lang": "en", "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/x86/kvm/svm/avic.c" ], "versions": [ { "version": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb", "lessThan": "0fb470eb48892e131d10aa3be6915239e65758f3", "status": "affected", "versionType": "git" }, { "version": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb", "lessThan": "3fa2d747960521a646fc1aad7aea82e95e139a68", "status": "affected", "versionType": "git" }, { "version": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb", "lessThan": "e4d153d53d9648513481eb4ef8c212e7f1f8173d", "status": "affected", "versionType": "git" }, { "version": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb", "lessThan": "a6ffdebfb6a9c2ffeed902b544b96fe67498210e", "status": "affected", "versionType": "git" }, { "version": "411b44ba80ab0023383fe3f377e903cb0cb7d8bb", "lessThan": "a80ced6ea514000d34bf1239d47553de0d1ee89e", "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/svm/avic.c" ], "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.110", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.33", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.19", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.2", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "4.9", "versionEndExcluding": "5.10.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.16.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.17.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0fb470eb48892e131d10aa3be6915239e65758f3" }, { "url": "https://git.kernel.org/stable/c/3fa2d747960521a646fc1aad7aea82e95e139a68" }, { "url": "https://git.kernel.org/stable/c/e4d153d53d9648513481eb4ef8c212e7f1f8173d" }, { "url": "https://git.kernel.org/stable/c/a6ffdebfb6a9c2ffeed902b544b96fe67498210e" }, { "url": "https://git.kernel.org/stable/c/a80ced6ea514000d34bf1239d47553de0d1ee89e" } ], "title": "KVM: SVM: fix panic on out-of-bounds guest IRQ", "x_generator": { "engine": "bippy-1.2.0" } } } }