CVE-2026-31628 (GCVE-0-2026-31628)
Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-09-08 08:47
VLAI
EPSS
VEX
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
5.5 (Medium)
Assigner
References
11 references
Impacted products
8 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| 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: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < e55d98e7756135f32150b9b8f75d580d0d4b2dd3 (git) Affected: 5abd1583e06b3963e5c9d915760367de86808b78 (git) Affected: 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (git) Affected: 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (git) Affected: 3.16.58 , < 3.17 (semver) Affected: 4.4.144 , < 4.5 (semver) Affected: 4.9.102 , < 4.10 (semver) |
guessed | |
| Linux | Linux |
Affected:
4.14
Unaffected: 0 , < 4.14 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.169 , ≤ 6.1.* (semver) Unaffected: 6.6.135 , ≤ 6.6.* (semver) Unaffected: 6.12.82 , ≤ 6.12.* (semver) Unaffected: 6.18.23 , ≤ 6.18.* (semver) Unaffected: 6.19.13 , ≤ 6.19.* (semver) Unaffected: 7.0.1 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"affected": [
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-08T08:47:48.248Z",
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
}
],
"x_adpType": "supplier"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/x86/include/asm/msr-index.h",
"arch/x86/kernel/cpu/amd.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ed7a3a246309ccc807238f1b4f159ee6d37ff9c4",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "0548529af20e68c6552817834b766646dd3bd7a7",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "1272cfedf4cd1019ddf583917a99b62f2d3645bb",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "91f02726b2203b71545713ecb7fb006e60a2d66f",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "b731aca06387b195058a9f6449a03b62efa1bd10",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "ad17f07e95e6e8505e2153e5b391f0d27eacce25",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "e6af5286efe5a56128b34032572c9ce9ebeccda3",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "546785c719418c6166834a47e372a88f5f7ae893",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "e55d98e7756135f32150b9b8f75d580d0d4b2dd3",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"status": "affected",
"version": "5abd1583e06b3963e5c9d915760367de86808b78",
"versionType": "git"
},
{
"status": "affected",
"version": "4ba461d426490b6ed7e8298c4d3b7a13aa5d2686",
"versionType": "git"
},
{
"status": "affected",
"version": "5a63725cd18fcee2af6ec46ccb856b64ad3077b4",
"versionType": "git"
},
{
"lessThan": "3.17",
"status": "affected",
"version": "3.16.58",
"versionType": "semver"
},
{
"lessThan": "4.5",
"status": "affected",
"version": "4.4.144",
"versionType": "semver"
},
{
"lessThan": "4.10",
"status": "affected",
"version": "4.9.102",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/x86/include/asm/msr-index.h",
"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",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.253",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.203",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.169",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.135",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.82",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.23",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.13",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.1",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1",
"versionStartIncluding": "4.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.16.58",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.4.144",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.9.102",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"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": "2026-06-14T17:43:19.462Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4"
},
{
"url": "https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7"
},
{
"url": "https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb"
},
{
"url": "https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f"
},
{
"url": "https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10"
},
{
"url": "https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25"
},
{
"url": "https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3"
},
{
"url": "https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893"
},
{
"url": "https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3"
}
],
"title": "x86/CPU: Fix FPDSS on Zen1",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-31628",
"datePublished": "2026-04-24T14:42:49.181Z",
"dateReserved": "2026-03-09T15:48:24.124Z",
"dateUpdated": "2026-09-08T08:47:48.248Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-31628",
"date": "2026-09-30",
"epss": "0.00171",
"percentile": "0.05772"
},
"microsoft_vex": {
"current_release_date": "2026-09-25T02:39:29.000Z",
"cve": "CVE-2026-31628",
"id": "msrc_CVE-2026-31628",
"initial_release_date": "2026-04-26T01:08:04.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "4",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "x86/CPU: Fix FPDSS on Zen1",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31628.json",
"version": "7"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/x86/include/asm/msr-index.h",
"arch/x86/kernel/cpu/amd.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ed7a3a246309ccc807238f1b4f159ee6d37ff9c4",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "0548529af20e68c6552817834b766646dd3bd7a7",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "1272cfedf4cd1019ddf583917a99b62f2d3645bb",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "91f02726b2203b71545713ecb7fb006e60a2d66f",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "b731aca06387b195058a9f6449a03b62efa1bd10",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "ad17f07e95e6e8505e2153e5b391f0d27eacce25",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "e6af5286efe5a56128b34032572c9ce9ebeccda3",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "546785c719418c6166834a47e372a88f5f7ae893",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"lessThan": "e55d98e7756135f32150b9b8f75d580d0d4b2dd3",
"status": "affected",
"version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
"versionType": "git"
},
{
"status": "affected",
"version": "5abd1583e06b3963e5c9d915760367de86808b78",
"versionType": "git"
},
{
"status": "affected",
"version": "4ba461d426490b6ed7e8298c4d3b7a13aa5d2686",
"versionType": "git"
},
{
"status": "affected",
"version": "5a63725cd18fcee2af6ec46ccb856b64ad3077b4",
"versionType": "git"
},
{
"lessThan": "3.17",
"status": "affected",
"version": "3.16.58",
"versionType": "semver"
},
{
"lessThan": "4.5",
"status": "affected",
"version": "4.4.144",
"versionType": "semver"
},
{
"lessThan": "4.10",
"status": "affected",
"version": "4.9.102",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/x86/include/asm/msr-index.h",
"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",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.5",
"versionType": "custom"
}
]
}
],
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C1981AEB-4867-4AB9-8168-BAB8D6567131",
"versionEndExcluding": "3.17",
"versionStartIncluding": "3.16.58",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7E307C3F-E33B-4061-B210-F031D88F5C6E",
"versionEndExcluding": "4.5",
"versionStartIncluding": "4.4.144",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "96373A7C-EBC6-4D06-941C-481E7B24579D",
"versionEndExcluding": "4.10",
"versionStartIncluding": "4.9.102",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A6FC7EE9-71F9-4ACC-9566-0299D47F2B4A",
"versionEndExcluding": "5.10.253",
"versionStartIncluding": "4.14.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045",
"versionEndExcluding": "5.15.203",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "DBEC0E5D-641C-4E98-A6D9-5799B10CE451",
"versionEndExcluding": "6.1.169",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "15C1A1B2-14EE-494C-AF3E-D5A7BA640B39",
"versionEndExcluding": "6.6.135",
"versionStartIncluding": "6.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "02904CAE-71D2-45B3-9EC3-F6A9D18B6307",
"versionEndExcluding": "6.12.82",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E9E09FDD-9EE3-4A56-92E2-2B30AFD0072F",
"versionEndExcluding": "6.18.23",
"versionStartIncluding": "6.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1490EF9B-9080-481C-8D22-1306AAE664E4",
"versionEndExcluding": "6.19.13",
"versionStartIncluding": "6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A",
"versionEndExcluding": "7.0.1",
"versionStartIncluding": "7.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.14:-:*:*:*:*:*:*",
"matchCriteriaId": "7875AA30-1F6F-470C-A52D-ECBD6663CEC5",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"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."
}
],
"id": "CVE-2026-31628",
"lastModified": "2026-07-14T13:18:46.023",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2026-04-24T15:16:42.103",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4"
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T11:42:39+00:00",
"cve": "CVE-2026-31628",
"id": "CVE-2026-31628",
"initial_release_date": "2026-04-24T00:00:00+00:00",
"product_status:known_affected": "260",
"product_status:known_not_affected": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: x86/CPU: Fix FPDSS on Zen1",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31628.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-01T01:30:45Z",
"cve": "CVE-2026-31628",
"id": "CVE-2026-31628",
"initial_release_date": "2026-04-25T01:37:37Z",
"product_status:known_affected": "86",
"product_status:known_not_affected": "96",
"product_status:recommended": "469",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-31628",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31628.json",
"version": "26"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…