310 lines
16 KiB
JSON
310 lines
16 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-2026-31464",
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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": "2026-03-09T15:48:24.097Z",
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"datePublished": "2026-04-22T13:53:54.970Z",
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"dateUpdated": "2026-10-19T18:35:49.523Z"
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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": "2026-08-05T12:22:45.348Z"
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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\nscsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()\n\nA malicious or compromised VIO server can return a num_written value in the\ndiscover targets MAD response that exceeds max_targets. This value is\nstored directly in vhost->num_targets without validation, and is then used\nas the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which\nis only allocated for max_targets entries. Indices at or beyond max_targets\naccess kernel memory outside the DMA-coherent allocation. The\nout-of-bounds data is subsequently embedded in Implicit Logout and PLOGI\nMADs that are sent back to the VIO server, leaking kernel memory.\n\nFix by clamping num_written to max_targets before storing it."
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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:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 8.1,
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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:A - Reachable through IBM Power VIO virtual Fibre Channel CRQ/MAD responses from the backing VIO server on the same virtual I/O fabric, not through a local syscall or routable network path.\nAC:L - A malicious or compromised VIO server directly controls the `num_written` value in the Discover Targets response; no race or hard-to-control condition is required once the adapter is initialized.\nPR:N - No privilege or authentication check in the Linux guest gates this completion path; the crafted response is accepted from the configured VIO partner.\nUI:N - The vulnerable discovery flow runs during adapter initialization/reinitialization and processes the VIO server response without requiring any end-user action.\nS:U - The impact is on the guest Linux kernel/driver resources that process the malicious virtual device response; this is not a VM escape or IOMMU/DMA boundary bypass.\nC:H - The excessive `num_written` causes out-of-bounds reads beyond the discovery buffer, and the derived values are sent back to the VIO server in Implicit Logout/PLOGI MADs, leaking kernel memory.\nI:N - The investigated bug is an out-of-bounds read used to construct outbound MAD fields; I did not find an out-of-bounds write or arbitrary kernel memory modification primitive.\nA:H - The server-controlled oversized count can drive reads far beyond the DMA-coherent allocation and create excessive target-processing work, making kernel oops, hang, or resource exhaustion plausible."
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}
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]
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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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"drivers/scsi/ibmvscsi/ibmvfc.c"
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],
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"versions": [
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{
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"version": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "d842348f8a00d5b1d7358f207eb34ffcf5b16df3",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "a007246cb6c9ebdc93dafbf63cc2d43d98f402cc",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "4ed727e35b0ab17d3eeeb1e8023768396e2be161",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "d1466bf991b2343cf2ba8336e440c8faf3cbb780",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "786f10b1966e485046839f992e89f2c18cbd1983",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "bae4df0a643fa7f84663473aa3082a9c2ed139db",
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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": "072b91f9c6510d0ec4a49d07dbc318760c7da7b3",
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"lessThan": "61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f",
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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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"drivers/scsi/ibmvscsi/ibmvfc.c"
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],
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"versions": [
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{
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"version": "2.6.27",
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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": "2.6.27",
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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": "5.10.253",
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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": "5.15.203",
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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": "6.1.168",
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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": "6.6.131",
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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": "6.12.80",
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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": "6.18.21",
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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": "6.19.11",
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"lessThanOrEqual": "6.19.*",
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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",
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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": "2.6.27",
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"versionEndExcluding": "5.10.253"
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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": "2.6.27",
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"versionEndExcluding": "5.15.203"
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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": "2.6.27",
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"versionEndExcluding": "6.1.168"
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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": "2.6.27",
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"versionEndExcluding": "6.6.131"
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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": "2.6.27",
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"versionEndExcluding": "6.12.80"
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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": "2.6.27",
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"versionEndExcluding": "6.18.21"
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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": "2.6.27",
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"versionEndExcluding": "6.19.11"
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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": "2.6.27",
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"versionEndExcluding": "7.0"
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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/d842348f8a00d5b1d7358f207eb34ffcf5b16df3"
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},
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{
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"url": "https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc"
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},
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{
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"url": "https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89"
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},
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{
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"url": "https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161"
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},
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{
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"url": "https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780"
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},
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{
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"url": "https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983"
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},
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{
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"url": "https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db"
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},
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{
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"url": "https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f"
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}
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],
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"title": "scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()",
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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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"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-2026-31464",
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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": "2026-10-16T15:09:42.415310Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-125",
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"description": "CWE-125 Out-of-bounds Read"
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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": "2026-10-19T18:35:49.523Z"
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}
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}
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]
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}
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} |