159 lines
8.7 KiB
JSON
159 lines
8.7 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-2026-43274",
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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": "2026-05-01T14:12:55.998Z",
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"datePublished": "2026-05-06T11:28:57.503Z",
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"dateUpdated": "2026-08-05T12:26:59.090Z"
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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": "2026-08-05T12:26:59.090Z"
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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\nmailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()\n\nThe cluster_cfg array is dynamically allocated to hold per-CPU\nconfiguration structures, with its size based on the number of online\nCPUs. Previously, this array was indexed using hartid, which may be\nnon-contiguous or exceed the bounds of the array, leading to\nout-of-bounds access.\nSwitch to using cpuid as the index, as it is guaranteed to be within\nthe valid range provided by for_each_online_cpu()."
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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:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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:L - The vulnerable code is reached through local platform-driver probe and the local Microchip IPC/IHC interrupt path, not through network packets. A plausible attacker would need local control of the affected platform/IPC peer or firmware configuration to trigger the bad hart/IRQ condition.\nAC:L - The bug is a direct non-contiguous hart ID versus CPU index mismatch with no race or timing requirement. Such hart mappings are plausible for this Microchip RISC-V platform, so triggering does not depend on conditions outside the attacker's control once the affected path is reachable.\nPR:N - The vulnerable probe and IRQ handler perform no Linux credential, capability, or authentication checks. An attacker able to drive the local IPC peer/firmware-triggered path does not need privileges inside the vulnerable Linux instance.\nUI:N - No victim action is required after the affected platform path is reachable. Probe-time setup or an IPC interrupt can hit the vulnerable access automatically.\nS:U - The corruption occurs in the Linux kernel driver and impacts the same kernel security authority. There is no VM escape, IOMMU bypass, or cross-authority boundary shown.\nC:H - The out-of-bounds index can read adjacent kernel memory/pointer fields and feed invalid buffer addresses into the SBI status path. Conservatively, this kernel OOB access can expose sensitive memory.\nI:H - The vulnerable probe path writes `irq`, `buf_base`, and `buf_base_addr` through an out-of-bounds `cluster_cfg[hartid]` index. This is kernel heap memory corruption and can plausibly be leveraged for control-flow or data integrity compromise.\nA:H - The same out-of-bounds access can corrupt kernel memory or dereference/copy through invalid pointers in interrupt context. A kernel oops, panic, or boot-time failure 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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"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/mailbox/mailbox-mchp-ipc-sbi.c"
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],
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"versions": [
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{
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"version": "e4b1d67e71419c4af581890ecea84b04920d4116",
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"lessThan": "95438699c92947155823dcd3918049a07f3cd867",
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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": "e4b1d67e71419c4af581890ecea84b04920d4116",
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"lessThan": "0442b6229e2eedc95a6d3d18ce75dec7f5b5377c",
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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": "e4b1d67e71419c4af581890ecea84b04920d4116",
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"lessThan": "f7c330a8c83c9b0332fd524097eaf3e69148164d",
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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/mailbox/mailbox-mchp-ipc-sbi.c"
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],
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"versions": [
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{
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"version": "6.14",
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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": "6.14",
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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": "6.18.16",
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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": "6.19.6",
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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": "6.14",
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"versionEndExcluding": "6.18.16"
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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": "6.14",
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"versionEndExcluding": "6.19.6"
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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": "6.14",
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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/95438699c92947155823dcd3918049a07f3cd867"
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},
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{
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"url": "https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c"
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},
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{
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"url": "https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d"
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}
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],
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"title": "mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()",
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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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}
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} |