CVE-2026-31628 (GCVE-0-2026-31628)
Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-25 05:48
VLAI?
Title
x86/CPU: Fix FPDSS on Zen1
Summary
In the Linux kernel, the following vulnerability has been resolved:
x86/CPU: Fix FPDSS on Zen1
Zen1's hardware divider can leave, under certain circumstances, partial
results from previous operations. Those results can be leaked by
another, attacker thread.
Fix that with a chicken bit.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < ed7a3a246309ccc807238f1b4f159ee6d37ff9c4
(git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 0548529af20e68c6552817834b766646dd3bd7a7 (git) Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 1272cfedf4cd1019ddf583917a99b62f2d3645bb (git) Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 91f02726b2203b71545713ecb7fb006e60a2d66f (git) Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < b731aca06387b195058a9f6449a03b62efa1bd10 (git) Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < ad17f07e95e6e8505e2153e5b391f0d27eacce25 (git) Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < e6af5286efe5a56128b34032572c9ce9ebeccda3 (git) Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 546785c719418c6166834a47e372a88f5f7ae893 (git) Affected: 5abd1583e06b3963e5c9d915760367de86808b78 (git) Affected: 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (git) Affected: 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (git) |
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{
"containers": {
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},
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"arch/x86/kernel/cpu/amd.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.14"
},
{
"lessThan": "4.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.169",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.135",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.82",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.23",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.1",
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}
]
}
],
"cpeApplicability": [
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"nodes": [
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{
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"descriptions": [
{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/CPU: Fix FPDSS on Zen1\n\nZen1\u0027s hardware divider can leave, under certain circumstances, partial\nresults from previous operations. Those results can be leaked by\nanother, attacker thread.\n\nFix that with a chicken bit."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-25T05:48:27.734Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"datePublished": "2026-04-24T14:42:49.181Z",
"dateReserved": "2026-03-09T15:48:24.124Z",
"dateUpdated": "2026-04-25T05:48:27.734Z",
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"vulnerability-lookup:meta": {
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"date": "2026-04-25",
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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