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vuln-cve/data/2026/31xxx/CVE-2026-31423.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-31423",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-03-09T15:48:24.088Z",
"datePublished": "2026-04-13T13:40:26.567Z",
"dateUpdated": "2026-11-10T12:44:10.861Z"
},
"containers": {
"cna": {
"providerMetadata": {
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"shortName": "Linux",
"dateUpdated": "2026-05-11T22:08:25.251Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_hfsc: fix divide-by-zero in rtsc_min()\n\nm2sm() converts a u32 slope to a u64 scaled value. For large inputs\n(e.g. m1=4000000000), the result can reach 2^32. rtsc_min() stores\nthe difference of two such u64 values in a u32 variable `dsm` and\nuses it as a divisor. When the difference is exactly 2^32 the\ntruncation yields zero, causing a divide-by-zero oops in the\nconcave-curve intersection path:\n\n Oops: divide error: 0000\n RIP: 0010:rtsc_min (net/sched/sch_hfsc.c:601)\n Call Trace:\n init_ed (net/sched/sch_hfsc.c:629)\n hfsc_enqueue (net/sched/sch_hfsc.c:1569)\n [...]\n\nWiden `dsm` to u64 and replace do_div() with div64_u64() so the full\ndifference is preserved."
}
],
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"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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],
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
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],
"versions": [
{
"version": "2.6.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.12",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.253",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.203",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.168",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
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},
{
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"lessThanOrEqual": "6.6.*",
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{
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"lessThanOrEqual": "6.12.*",
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{
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"lessThanOrEqual": "6.18.*",
"status": "unaffected",
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{
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"status": "unaffected",
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},
{
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"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.10.253"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
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},
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.6.134"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.12.81"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
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},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "7.0"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/ad8e8fec40290a8c8cf145c0deaadf76f80c5163"
},
{
"url": "https://git.kernel.org/stable/c/ab1ff5890c7354afc7be56502fcfbd61f3b7ae4f"
},
{
"url": "https://git.kernel.org/stable/c/25b6821884713a31e2b49fb67b0ebd765b33e0a9"
},
{
"url": "https://git.kernel.org/stable/c/c56f78614e7781aaceca9bd3cb2128bf7d45c3bd"
},
{
"url": "https://git.kernel.org/stable/c/b9e6431cbea8bb1fae8069ed099b4ee100499835"
},
{
"url": "https://git.kernel.org/stable/c/17c1b9807b8a67d676b6dcf749ee932ebaa7f568"
},
{
"url": "https://git.kernel.org/stable/c/d0aefec1b1a1ba2c1d251028dc2c4e5b4ce1fea5"
},
{
"url": "https://git.kernel.org/stable/c/4576100b8cd03118267513cafacde164b498b322"
}
],
"title": "net/sched: sch_hfsc: fix divide-by-zero in rtsc_min()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"x_adpType": "supplier",
"providerMetadata": {
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP",
"dateUpdated": "2026-11-10T12:44:10.861Z"
},
"affected": [
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"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
"versions": [
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}
],
"defaultStatus": "unknown"
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{
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{
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},
{
"metrics": [
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"content": {
"id": "CVE-2026-31423",
"role": "CISA Coordinator",
"options": [
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},
{
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{
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}
],
"version": "2.0.3",
"timestamp": "2026-11-05T21:32:50.480197Z"
}
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],
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"shortName": "CISA-ADP",
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}
}
]
}
}
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