310 lines
14 KiB
JSON
310 lines
14 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-2026-31696",
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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": "2026-03-09T15:48:24.131Z",
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"datePublished": "2026-05-01T13:55:57.485Z",
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"dateUpdated": "2026-11-06T15:32:23.459Z"
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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": "2026-06-14T17:43:27.449Z"
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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\nrxrpc: Fix missing validation of ticket length in non-XDR key preparsing\n\nIn rxrpc_preparse(), there are two paths for parsing key payloads: the\nXDR path (for large payloads) and the non-XDR path (for payloads <= 28\nbytes). While the XDR path (rxrpc_preparse_xdr_rxkad()) correctly\nvalidates the ticket length against AFSTOKEN_RK_TIX_MAX, the non-XDR\npath fails to do so.\n\nThis allows an unprivileged user to provide a very large ticket length.\nWhen this key is later read via rxrpc_read(), the total\ntoken size (toksize) calculation results in a value that exceeds\nAFSTOKEN_LENGTH_MAX, triggering a WARN_ON().\n\n[ 2001.302904] WARNING: CPU: 2 PID: 2108 at net/rxrpc/key.c:778 rxrpc_read+0x109/0x5c0 [rxrpc]\n\nFix this by adding a check in the non-XDR parsing path of rxrpc_preparse()\nto ensure the ticket length does not exceed AFSTOKEN_RK_TIX_MAX,\nbringing it into parity with the XDR parsing logic."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/rxrpc/key.c"
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],
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"versions": [
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "44714dfda386884919ba366411880b6fb3c3efd3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "41a117dd80371343babc52198d1114e83eb37627",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "9a397aa9b5e53ca63d4d6aefb542832eca389618",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "1fa36cf495b0023e8475d038535c05e4063211e1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "4458757c020592a3094366e0fb20457383b42f92",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "ce383ba615339f8eaec646a166d2c2b015bb5ca0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "a1be1c9ece26cea69654f28b255ff9a7906b897b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8a7a3eb4ddbe7c7e639170a64adede7cbd5a9247",
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"lessThan": "ac33733b10b484d666f97688561670afd5861383",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/rxrpc/key.c"
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],
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"versions": [
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{
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"version": "3.17",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.17",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.258",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.136",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.84",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.25",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.2",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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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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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "5.10.258"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "5.15.209"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.1.175"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.6.136"
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.12.84"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.18.25"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "7.0.2"
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},
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{
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"vulnerable": true,
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/44714dfda386884919ba366411880b6fb3c3efd3"
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},
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{
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"url": "https://git.kernel.org/stable/c/41a117dd80371343babc52198d1114e83eb37627"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a397aa9b5e53ca63d4d6aefb542832eca389618"
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},
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{
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"url": "https://git.kernel.org/stable/c/1fa36cf495b0023e8475d038535c05e4063211e1"
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},
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{
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"url": "https://git.kernel.org/stable/c/4458757c020592a3094366e0fb20457383b42f92"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce383ba615339f8eaec646a166d2c2b015bb5ca0"
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},
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{
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"url": "https://git.kernel.org/stable/c/a1be1c9ece26cea69654f28b255ff9a7906b897b"
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},
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{
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"url": "https://git.kernel.org/stable/c/ac33733b10b484d666f97688561670afd5861383"
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}
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],
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"title": "rxrpc: Fix missing validation of ticket length in non-XDR key preparsing",
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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": "2026-10-15T01:17:54.785Z"
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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 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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}
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],
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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}
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]
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},
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-31696",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T15:24:31.625988Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T15:32:23.459Z"
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}
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}
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]
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}
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} |