222 lines
12 KiB
JSON
222 lines
12 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-2026-89992",
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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": "2026-09-11T19:38:34.780Z",
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"datePublished": "2026-09-16T10:33:05.925Z",
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"dateUpdated": "2026-10-19T08:56:06.466Z"
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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": "2026-10-19T08:56:06.466Z"
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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\ncpuidle: dt_idle_genpd: kfree() the original name allocation\n\ndt_idle_pd_alloc() kasprintf()s the full node path, then points\npd->name at kbasename() of that string. dt_idle_pd_free() kfree()s\npd->name, which is no longer the start of the allocation.\n\nCopy the basename instead."
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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 invalid free is reached only from local PSCI and RISC-V SBI CPU idle genpd bring-up (psci_cpuidle_domain_probe and sbi_genpd_probe calling dt_idle_pd_alloc/dt_idle_pd_free) on ARM phones, automotive, and RISC-V boards; no network, Bluetooth, or USB receive path calls this code.\nAC:L - After dt_idle_pd_alloc() succeeds, pd->name is an interior kbasename() pointer into the kasprintf() buffer; any later psci_pd_init/sbi_pd_init unwind (ENOMEM from genpd_alloc_data or pd_provider, or of_genpd_add_provider_simple failure) deterministically kfree()s that pointer, with no race or layout lottery.\nPR:N - Both callers are builtin initcalls (core_initcall/arch_initcall) whose platform probe runs automatically on hierarchical CPU idle DT with no capability or credential check, so a Linux account is not required to reach the vulnerable unwind.\nUI:N - Probe and error unwind run during kernel initialization and deferred-probe retries; no victim needs to mount a filesystem, open a device, or load a module.\nS:U - The interior-pointer kfree corrupts host kernel SLUB state within the same security authority and does not escape a VM, bypass IOMMU, or cross another sandbox boundary.\nC:H - kfree() of an interior kasprintf() pointer is an invalid free that corrupts slab metadata and overlapping objects; that memory-corruption primitive can be groomed into arbitrary kernel memory disclosure.\nI:H - SLUB treats the misaligned interior address as an object and corrupts the freelist; heap grooming can produce overlapping allocations and write primitives enabling control-flow hijack, matching this CNA's invalid-free scoring.\nA:H - Debug and KASAN builds oops on the invalid free, and without them the corrupted slab commonly panics during CPU idle genpd bring-up, so availability impact is a kernel crash."
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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/cpuidle/dt_idle_genpd.c"
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],
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"versions": [
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{
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"version": "9d976d6721dfb525b81ce981e1363c70c0975aab",
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"lessThan": "1312ae33b91430ec99e69cd3d47f0e50a4ebf54b",
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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": "9d976d6721dfb525b81ce981e1363c70c0975aab",
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"lessThan": "a38caa9ed0d5c61c17d88393b14b292199289c1f",
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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": "9d976d6721dfb525b81ce981e1363c70c0975aab",
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"lessThan": "09d002c8fb0261d35ce9d8a705de5db034ee90b8",
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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": "9d976d6721dfb525b81ce981e1363c70c0975aab",
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"lessThan": "b519dfce1998c323e54a56f911cf708d9ba0e076",
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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": "9d976d6721dfb525b81ce981e1363c70c0975aab",
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"lessThan": "3394c7ba23336bdb7ece29127130fd01731d42d8",
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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": "9d976d6721dfb525b81ce981e1363c70c0975aab",
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"lessThan": "2b0ac85512b7f67479127b2713254490662eb13d",
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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/cpuidle/dt_idle_genpd.c"
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],
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"versions": [
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{
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"version": "5.18",
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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": "5.18",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.110",
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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": "6.18.51",
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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": "7.2.5",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "5.18",
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"versionEndExcluding": "6.1.188"
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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": "5.18",
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"versionEndExcluding": "6.6.157"
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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": "5.18",
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"versionEndExcluding": "6.12.110"
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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": "5.18",
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"versionEndExcluding": "6.18.51"
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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": "5.18",
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"versionEndExcluding": "7.2.5"
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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": "5.18",
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"versionEndExcluding": "7.3"
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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/1312ae33b91430ec99e69cd3d47f0e50a4ebf54b"
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},
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{
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"url": "https://git.kernel.org/stable/c/a38caa9ed0d5c61c17d88393b14b292199289c1f"
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},
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{
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"url": "https://git.kernel.org/stable/c/09d002c8fb0261d35ce9d8a705de5db034ee90b8"
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},
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{
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"url": "https://git.kernel.org/stable/c/b519dfce1998c323e54a56f911cf708d9ba0e076"
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},
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{
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"url": "https://git.kernel.org/stable/c/3394c7ba23336bdb7ece29127130fd01731d42d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/2b0ac85512b7f67479127b2713254490662eb13d"
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}
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],
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"title": "cpuidle: dt_idle_genpd: kfree() the original name allocation",
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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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} |