CVE-2026-89992

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89992", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.780Z", "datePublished": "2026-09-16T10:33:05.925Z", "dateUpdated": "2026-10-19T08:56:06.466Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:56:06.466Z"}, "descriptions": [{"lang": "en", "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cpuidle/dt_idle_genpd.c"], "versions": [{"version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "lessThan": "1312ae33b91430ec99e69cd3d47f0e50a4ebf54b", "status": "affected", "versionType": "git"}, {"version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "lessThan": "a38caa9ed0d5c61c17d88393b14b292199289c1f", "status": "affected", "versionType": "git"}, {"version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "lessThan": "09d002c8fb0261d35ce9d8a705de5db034ee90b8", "status": "affected", "versionType": "git"}, {"version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "lessThan": "b519dfce1998c323e54a56f911cf708d9ba0e076", "status": "affected", "versionType": "git"}, {"version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "lessThan": "3394c7ba23336bdb7ece29127130fd01731d42d8", "status": "affected", "versionType": "git"}, {"version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "lessThan": "2b0ac85512b7f67479127b2713254490662eb13d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cpuidle/dt_idle_genpd.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1312ae33b91430ec99e69cd3d47f0e50a4ebf54b"}, {"url": "https://git.kernel.org/stable/c/a38caa9ed0d5c61c17d88393b14b292199289c1f"}, {"url": "https://git.kernel.org/stable/c/09d002c8fb0261d35ce9d8a705de5db034ee90b8"}, {"url": "https://git.kernel.org/stable/c/b519dfce1998c323e54a56f911cf708d9ba0e076"}, {"url": "https://git.kernel.org/stable/c/3394c7ba23336bdb7ece29127130fd01731d42d8"}, {"url": "https://git.kernel.org/stable/c/2b0ac85512b7f67479127b2713254490662eb13d"}], "title": "cpuidle: dt_idle_genpd: kfree() the original name allocation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/cpuidle/dt_idle_genpd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1312ae33b91430ec99e69cd3d47f0e50a4ebf54b", "status": "affected", "version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "versionType": "git"}, {"lessThan": "a38caa9ed0d5c61c17d88393b14b292199289c1f", "status": "affected", "version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "versionType": "git"}, {"lessThan": "09d002c8fb0261d35ce9d8a705de5db034ee90b8", "status": "affected", "version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "versionType": "git"}, {"lessThan": "b519dfce1998c323e54a56f911cf708d9ba0e076", "status": "affected", "version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "versionType": "git"}, {"lessThan": "3394c7ba23336bdb7ece29127130fd01731d42d8", "status": "affected", "version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "versionType": "git"}, {"lessThan": "2b0ac85512b7f67479127b2713254490662eb13d", "status": "affected", "version": "9d976d6721dfb525b81ce981e1363c70c0975aab", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/cpuidle/dt_idle_genpd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-89992", "lastModified": "2026-10-19T09:18:46.363", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-16T11:17:10.350", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/09d002c8fb0261d35ce9d8a705de5db034ee90b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1312ae33b91430ec99e69cd3d47f0e50a4ebf54b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b0ac85512b7f67479127b2713254490662eb13d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3394c7ba23336bdb7ece29127130fd01731d42d8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a38caa9ed0d5c61c17d88393b14b292199289c1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b519dfce1998c323e54a56f911cf708d9ba0e076"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d976d6721dfb525b81ce981e1363c70c0975aab,1312ae33b91430ec99e69cd3d47f0e50a4ebf54b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d976d6721dfb525b81ce981e1363c70c0975aab,a38caa9ed0d5c61c17d88393b14b292199289c1f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d976d6721dfb525b81ce981e1363c70c0975aab,09d002c8fb0261d35ce9d8a705de5db034ee90b8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d976d6721dfb525b81ce981e1363c70c0975aab,b519dfce1998c323e54a56f911cf708d9ba0e076)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d976d6721dfb525b81ce981e1363c70c0975aab,3394c7ba23336bdb7ece29127130fd01731d42d8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d976d6721dfb525b81ce981e1363c70c0975aab,2b0ac85512b7f67479127b2713254490662eb13d)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-17T05:30:07.024327+00:00", "updated": "2026-09-18T08:30:06.686017+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-590"]}