{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46862", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.293Z", "datePublished": "2024-09-27T12:42:51.738Z", "dateUpdated": "2026-08-05T11:39:05.352Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:39:05.352Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item\n\nThere is no links_num in struct snd_soc_acpi_mach {}, and we test\n!link->num_adr as a condition to end the loop in hda_sdw_machine_select().\nSo an empty item in struct snd_soc_acpi_link_adr array is required." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H", "baseScore": 8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The defective table is consumed by `hda_sdw_machine_select()` during SOF PCI driver probe on the host itself; there is no network, adjacent-network, or attacker-attachable-device path — the SoundWire codec topology comes from soldered hardware and BIOS ACPI `_ADR` tables. The impact is confined to the local machine's kernel, making Local the applicable and highest-severity reachable vector.\nAC:L - On an affected Meteor Lake platform (cs42l43 reported on link 0), the first link entry matches, `link++` steps off the end of the one-element `mtl_cs42l43_l0[]` array, and the out-of-bounds read occurs deterministically on every probe — no race, timing window, or memory-layout gamble is involved. The `.rodata` contents that follow the array are fixed by the build, so the outcome is reproducible on every boot of that image.\nPR:N - The SOF Intel driver binds automatically from its PCI ID table at boot and walks `snd_soc_acpi_intel_mtl_sdw_machines[]` with no authentication, credential, or capability check anywhere on the path. No account or privilege level is needed for the out-of-bounds access to occur.\nUI:N - Machine selection happens inside driver probe during kernel initialization, before any userspace audio access. No mount, file open, or other victim action is required.\nS:U - The out-of-bounds read and any resulting fault occur in the kernel's own audio driver on the same host, within a single security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - Past the array end the loop reads a `u32 num_adr` and a `const struct snd_soc_acpi_adr_device *adr_d` from adjacent `.rodata`, then `snd_soc_acpi_sdw_link_slaves_found()` dereferences that OOB-derived pointer for `num_adr` iterations — an unbounded read at an address not constrained by any check, not a strictly bounded few-byte overread. The fetched `adr` values are decoded into part/mfg/link IDs and emitted to the kernel log via `dev_dbg()`, providing a disclosure channel for the out-of-bounds contents.\nI:L - The path is read-only — `link` is `const` and nothing is written out of bounds, so there is no memory-corruption or control-flow-hijack primitive. However, walking the unterminated array makes the loop evaluate unrelated link descriptors and reject the correct machine entry, so the driver selects a different machine descriptor and DSP topology than the firmware actually describes, a limited divergence of kernel configuration state.\nA:H - The out-of-bounds `adr_d` pointer combined with an out-of-bounds `num_adr` count can walk far past any mapped `.rodata` and fault, producing a kernel oops during driver probe. Even without a fault, the mis-terminated table causes the cs42l43-only machine to never be matched, leaving the audio device non-functional on every boot." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/intel/common/soc-acpi-intel-mtl-match.c" ], "versions": [ { "version": "f77ae7fcdc47630eb7653983f3c57ac44103aebc", "lessThan": "01281a9e8275946aa725db0919769b8d35af3a11", "status": "affected", "versionType": "git" }, { "version": "f77ae7fcdc47630eb7653983f3c57ac44103aebc", "lessThan": "bf6d7a44a144aa9c476dee83c23faf3151181bab", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/intel/common/soc-acpi-intel-mtl-match.c" ], "versions": [ { "version": "6.10", "status": "affected" }, { "version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.11", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "6.10", "versionEndExcluding": "6.10.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/01281a9e8275946aa725db0919769b8d35af3a11" }, { "url": "https://git.kernel.org/stable/c/bf6d7a44a144aa9c476dee83c23faf3151181bab" } ], "title": "ASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T13:49:23.635334Z", "id": "CVE-2024-46862", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T13:49:28.174Z" } } ] } }