UnratedFix available
x86/CPU: Fix FPDSS on Zen1
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.253, 5.15.203, 6.1.169, 6.12.82, 6.18.23, 6.19.13, 6.6.135, 7.0.1
- CVEs
- CVE-2026-31628
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 03:36 UTC · Revision 1
Source evidence
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.
osv:CVE-2026-31628
Kernel
Fixed versions: 5.10.253, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, 6.19.13, 7.0.1
Complete source record
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"method": "structured",
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"kind": "advisory",
"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.",
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"modified": "2026-10-28T02:30:25.668028051Z",
"provider": "osv",
"references": [
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"https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
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"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31628.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-31628",
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"source_id": "core-osv",
"document_id": 492235,
"published_at": "2026-04-24T14:42:49.181+00:00"
}