{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46863", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.293Z", "datePublished": "2024-09-27T12:42:52.373Z", "dateUpdated": "2026-08-05T11:39:06.428Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:39:06.428Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: Intel: soc-acpi-intel-lnl-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:L/UI:N/S:U/C:H/I:L/A:H", "baseScore": 7.3, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The out-of-bounds walk occurs inside the SOF/HDA PCI driver probe path (`hda_sdw_machine_select`) and the `sof_sdw` machine driver, which are reachable only in the local system context — there is no network, packet, or remote-peer input feeding this code. Re-triggering it requires local driver bind/rebind or a reboot of the affected Lunar Lake platform.\nAC:L - On an affected platform (Intel LNL with a cs42l43 on SoundWire link 0) the unterminated array is walked deterministically on every probe, with no race, timing window, or memory-layout grooming required. There are no conditions the attacker must win or wait for.\nPR:L - No authentication or capability check gates the code — it runs during device probe — but deliberately causing the probe to re-execute (module load or `/sys/bus/pci/drivers/.../bind`) requires local system access. No remote credentials or user-namespace escalation are involved.\nUI:N - The vulnerable loop executes automatically during driver probe at boot; no victim must open a file, mount a filesystem, or take any action.\nS:U - Both the defective data and the faulting reads are within the kernel's own security authority; nothing crosses a VM, IOMMU, or sandbox boundary.\nC:H - This is an out-of-bounds read that is not confined to a few bytes: `hda_sdw_machine_select` reads up to three 16-byte structs past the array, and the OOB-derived `adr_d`/`name_prefix` pointers are then dereferenced in `snd_soc_acpi_sdw_link_slaves_found()` and `parse_sdw_endpoints()`, allowing kernel memory at an uncontrolled address to be read. In the `sof_sdw` path the walk is entirely unbounded and OOB `name_prefix` strings can surface in DAI-link/component names exposed to userspace via /proc/asound and sysfs.\nI:L - There is no out-of-bounds write or arbitrary-write primitive, but the kernel selects the audio machine driver, topology firmware file, and constructs DAI-link/endpoint structures from data read past the end of the array, so kernel state and device configuration are derived from invalid memory.\nA:H - The OOB entry supplies both a `num_adr` count and an `adr_d` pointer that are dereferenced without validation, so a neighbouring `.rodata` object that is not a valid `snd_soc_acpi_link_adr` produces a wild-pointer read and a kernel oops at probe time; the unbounded walk in `sof_sdw.c` compounds this. On the observed layout the machine fails to match, causing complete loss of audio functionality on affected devices." } ] } ], "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-lnl-match.c" ], "versions": [ { "version": "dd3bd9dc47084195fcb3c1b371cb03046abb13ab", "lessThan": "8eb57389d8ad91c67bf844f5aae4caef74b9091b", "status": "affected", "versionType": "git" }, { "version": "dd3bd9dc47084195fcb3c1b371cb03046abb13ab", "lessThan": "c4246f1fe9f24f8dcd97887ed67d8fcfd91f4796", "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-lnl-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/8eb57389d8ad91c67bf844f5aae4caef74b9091b" }, { "url": "https://git.kernel.org/stable/c/c4246f1fe9f24f8dcd97887ed67d8fcfd91f4796" } ], "title": "ASoC: Intel: soc-acpi-intel-lnl-match: add missing empty item", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T13:45:58.346254Z", "id": "CVE-2024-46863", "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": "2024-09-29T13:49:05.489Z" } } ] } }