{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56662", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T15:00:39.843Z", "datePublished": "2024-12-27T15:06:24.661Z", "dateUpdated": "2026-08-05T11:45:56.280Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:56.280Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nacpi: nfit: vmalloc-out-of-bounds Read in acpi_nfit_ctl\n\nFix an issue detected by syzbot with KASAN:\n\nBUG: KASAN: vmalloc-out-of-bounds in cmd_to_func drivers/acpi/nfit/\ncore.c:416 [inline]\nBUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x20e8/0x24a0\ndrivers/acpi/nfit/core.c:459\n\nThe issue occurs in cmd_to_func when the call_pkg->nd_reserved2\narray is accessed without verifying that call_pkg points to a buffer\nthat is appropriately sized as a struct nd_cmd_pkg. This can lead\nto out-of-bounds access and undefined behavior if the buffer does not\nhave sufficient space.\n\nTo address this, a check was added in acpi_nfit_ctl() to ensure that\nbuf is not NULL and that buf_len is less than sizeof(*call_pkg)\nbefore accessing it. This ensures safe access to the members of\ncall_pkg, including the nd_reserved2 array." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached exclusively through the `ND_IOCTL_CALL` ioctl on the local libnvdimm character devices `/dev/ndctl%d` or `/dev/nmem%d`, requiring local system access. There is no remote or adjacent-network path into `acpi_nfit_ctl()`.\nAC:L - The attacker fully controls `nd_size_in`/`nd_size_out` in the ioctl payload, and the u32 overflow in `__nd_ioctl()` deterministically produces an undersized `vmalloc()` buffer on every attempt; the OOB read in `cmd_to_func()` occurs unconditionally before any command-mask validation. No race, timing window, or uninfluenceable memory layout is involved.\nPR:L - The entire path from `nd_ioctl()` through `acpi_nfit_ctl()` contains no `capable()` or capability check of any kind — access is gated only by filesystem permissions on the nvdimm device node plus the `O_RDONLY` rejection, so any account or container granted write access to `/dev/ndctl0`/`/dev/nmem0` (e.g. a delegated pmem-management group or a management container given the device) can trigger it. Since no in-kernel privilege gate exists, this is scored as low privileges rather than real root.\nUI:N - Exploitation is a single self-contained ioctl issued by the attacker's own process; no victim action, mount, or file open is required.\nS:U - The out-of-bounds access corrupts and discloses kernel memory within the same kernel security authority, and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - The undersized allocation causes reads of up to 40 bytes of stale kernel page data past the allocation (`nd_reserved2` and `nd_fw_size`), and the desynchronized `nd_size_in` is then passed to `acpi_evaluate_dsm()` as a buffer descriptor of attacker-chosen length (up to ~4 GB) pointing into the vmap area, exposing far more than a strictly bounded few bytes.\nI:H - The same undersized-buffer condition yields an out-of-bounds write: `call_pkg->nd_fw_size = out_obj->buffer.length` writes 4 bytes past the allocation, and `memcpy(call_pkg->nd_payload + call_pkg->nd_size_in, ...)` writes DSM output to an attacker-controlled offset roughly 4 GB beyond `buf`. An out-of-bounds write with attacker-influenced destination and length is a control-flow-hijack-capable primitive.\nA:H - The OOB access triggers a KASAN BUG on hardened kernels, and on production kernels the ~4 GB buffer length handed to the ACPI interpreter and the wild `memcpy` destination in the vmap region reliably fault, producing a kernel oops or panic. The condition is trivially repeatable." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/nfit/core.c" ], "versions": [ { "version": "ebe9f6f19d80d8978d16078dff3d5bd93ad8d102", "lessThan": "616aa5f3c86e0479bcbb81e41c08c43ff32af637", "status": "affected", "versionType": "git" }, { "version": "ebe9f6f19d80d8978d16078dff3d5bd93ad8d102", "lessThan": "bbdb3307f609ec4dc9558770f464ede01fe52aed", "status": "affected", "versionType": "git" }, { "version": "ebe9f6f19d80d8978d16078dff3d5bd93ad8d102", "lessThan": "143f723e9eb4f0302ffb7adfdc7ef77eab3f68e0", "status": "affected", "versionType": "git" }, { "version": "ebe9f6f19d80d8978d16078dff3d5bd93ad8d102", "lessThan": "e08dc2dc3c3f7938df0e4476fe3e6fdec5583c1d", "status": "affected", "versionType": "git" }, { "version": "ebe9f6f19d80d8978d16078dff3d5bd93ad8d102", "lessThan": "212846fafb753a48e869e2a342fc1e24048da771", "status": "affected", "versionType": "git" }, { "version": "ebe9f6f19d80d8978d16078dff3d5bd93ad8d102", "lessThan": "265e98f72bac6c41a4492d3e30a8e5fd22fe0779", "status": "affected", "versionType": "git" }, { "version": "63108f2a408abea7ecab063efa0f398da4d0d14b", "status": "affected", "versionType": "git" }, { "version": "f5878c4f084dc6b1386dad03970bb61ad5e9dc4b", "status": "affected", "versionType": "git" }, { "version": "0c79794474895dbbc3c52225f7e9f73cfecbb7dd", "status": "affected", "versionType": "git" }, { "version": "4.14.176", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.31", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.0.4", "lessThan": "5.1", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/nfit/core.c" ], "versions": [ { "version": "5.1", "status": "affected" }, { "version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.232", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.175", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.121", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.67", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.6", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "5.1", "versionEndExcluding": "5.10.232" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "5.15.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.1.121" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.6.67" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.12.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.31" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/616aa5f3c86e0479bcbb81e41c08c43ff32af637" }, { "url": "https://git.kernel.org/stable/c/bbdb3307f609ec4dc9558770f464ede01fe52aed" }, { "url": "https://git.kernel.org/stable/c/143f723e9eb4f0302ffb7adfdc7ef77eab3f68e0" }, { "url": "https://git.kernel.org/stable/c/e08dc2dc3c3f7938df0e4476fe3e6fdec5583c1d" }, { "url": "https://git.kernel.org/stable/c/212846fafb753a48e869e2a342fc1e24048da771" }, { "url": "https://git.kernel.org/stable/c/265e98f72bac6c41a4492d3e30a8e5fd22fe0779" } ], "title": "acpi: nfit: vmalloc-out-of-bounds Read in acpi_nfit_ctl", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-56662", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:59:57.981489Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:07:10.083Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:52:10.200Z" } } ] } }