CVE-2026-31558 (GCVE-0-2026-31558)
Vulnerability from cvelistv5
Published
2026-04-24 14:35
Modified
2026-04-27 14:04
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust
kvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so
cpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this
case so as to make it more robust.
This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].
References
| URL | Tags | |
|---|---|---|
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/loongarch/kvm/vcpu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "596c3f8069c4792f22fce8c4452f44410032d910",
"status": "affected",
"version": "73516e9da512adc63ba3859fbd82a21f6257348f",
"versionType": "git"
},
{
"lessThan": "878cf6acb4fd8ab4126cf9d369a5bb0e23123418",
"status": "affected",
"version": "73516e9da512adc63ba3859fbd82a21f6257348f",
"versionType": "git"
},
{
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"status": "affected",
"version": "73516e9da512adc63ba3859fbd82a21f6257348f",
"versionType": "git"
},
{
"lessThan": "2db06c15d8c7a0ccb6108524e16cd9163753f354",
"status": "affected",
"version": "73516e9da512adc63ba3859fbd82a21f6257348f",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/loongarch/kvm/vcpu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"lessThan": "6.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.80",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.21",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.80",
"versionStartIncluding": "6.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.21",
"versionStartIncluding": "6.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
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{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust\n\nkvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so\ncpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this\ncase so as to make it more robust.\n\nThis fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[]."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-27T14:04:04.707Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910"
},
{
"url": "https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418"
},
{
"url": "https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6b"
},
{
"url": "https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354"
}
],
"title": "LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust",
"x_generator": {
"engine": "bippy-1.2.0"
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}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-31558",
"datePublished": "2026-04-24T14:35:41.209Z",
"dateReserved": "2026-03-09T15:48:24.116Z",
"dateUpdated": "2026-04-27T14:04:04.707Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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