CVE-2026-31483 (GCVE-0-2026-31483)
Vulnerability from cvelistv5
Published
2026-04-22 13:54
Modified
2026-04-22 13:54
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
s390/syscalls: Add spectre boundary for syscall dispatch table
The s390 syscall number is directly controlled by userspace, but does
not have an array_index_nospec() boundary to prevent access past the
syscall function pointer tables.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 56e62a73702836017564eaacd5212e4d0fa1c01d Version: 56e62a73702836017564eaacd5212e4d0fa1c01d Version: 56e62a73702836017564eaacd5212e4d0fa1c01d Version: 56e62a73702836017564eaacd5212e4d0fa1c01d Version: 56e62a73702836017564eaacd5212e4d0fa1c01d Version: 56e62a73702836017564eaacd5212e4d0fa1c01d Version: 56e62a73702836017564eaacd5212e4d0fa1c01d |
||
{
"containers": {
"cna": {
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{
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"product": "Linux",
"programFiles": [
"arch/s390/kernel/syscall.c"
],
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"versions": [
{
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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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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.131",
"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": "5.15.203",
"versionStartIncluding": "5.12",
"vulnerable": true
},
{
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{
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{
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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\ns390/syscalls: Add spectre boundary for syscall dispatch table\n\nThe s390 syscall number is directly controlled by userspace, but does\nnot have an array_index_nospec() boundary to prevent access past the\nsyscall function pointer tables."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-22T13:54:09.561Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333"
},
{
"url": "https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310"
},
{
"url": "https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0"
},
{
"url": "https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4"
},
{
"url": "https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3"
},
{
"url": "https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256"
},
{
"url": "https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd"
}
],
"title": "s390/syscalls: Add spectre boundary for syscall dispatch table",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-31483",
"datePublished": "2026-04-22T13:54:09.561Z",
"dateReserved": "2026-03-09T15:48:24.101Z",
"dateUpdated": "2026-04-22T13:54:09.561Z",
"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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