484 lines
23 KiB
JSON
484 lines
23 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-31417",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-03-09T15:48:24.087Z",
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"datePublished": "2026-04-13T13:21:04.638Z",
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"dateUpdated": "2026-11-10T12:44:03.848Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:22:22.177Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/x25: Fix overflow when accumulating packets\n\nAdd a check to ensure that `x25_sock.fraglen` does not overflow.\n\nThe `fraglen` also needs to be resetted when purging `fragment_queue` in\n`x25_clear_queues()`."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable path is reached by received X.25 network packets delivered through the kernel `ETH_P_X25` packet handler on an X.25 link. A remote X.25 peer can establish or use a virtual circuit and send fragmented DATA packets to the affected host.\nAC:L - The attacker only needs to send valid sequenced DATA frames with the M bit set until the 16-bit fragment length wraps, then send a final fragment. There is no race or condition outside attacker control beyond ordinary X.25 connectivity.\nPR:N - For an exposed X.25 listener, the peer reaches this kernel receive path through Call Request and DATA frames without kernel-level authentication or local privileges. Route/device setup is administrative target configuration, not an attacker privilege requirement.\nUI:N - Once the vulnerable X.25 service/link is present, exploitation is driven entirely by attacker-supplied network frames. No victim user action is required.\nS:U - The vulnerability affects the kernel networking stack and impacts the same host security authority. It is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:N - The overflow leads to an undersized skb reassembly allocation, but the subsequent `skb_put()` bounds check triggers `skb_over_panic()` before an out-of-bounds copy occurs. I did not find a defensible kernel memory disclosure primitive from this path.\nI:N - The reachable failure mode is a checked skb overrun panic rather than an attacker-controlled write to kernel memory. I did not find a defensible integrity-impact primitive beyond denial of service.\nA:H - A remote peer can repeatedly trigger `skb_over_panic()`/`BUG()` during fragmented packet reassembly, causing a kernel oops or panic. This is a high availability impact."
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}
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]
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}
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},
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"version": "6.18.22",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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},
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{
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"version": "6.19.12",
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"lessThanOrEqual": "6.19.*",
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"status": "unaffected",
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},
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"title": "net/x25: Fix overflow when accumulating packets",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-11-10T12:44:03.848Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
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|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |