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CVE-2024-46863 (GCVE-0-2024-46863)

Vulnerability from cvelistv5 – Published: 2024-09-27 12:42 – Updated: 2026-08-05 11:39
VLAI
Title
ASoC: Intel: soc-acpi-intel-lnl-match: add missing empty item
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: soc-acpi-intel-lnl-match: add missing empty item There is no links_num in struct snd_soc_acpi_mach {}, and we test !link->num_adr as a condition to end the loop in hda_sdw_machine_select(). So an empty item in struct snd_soc_acpi_link_adr array is required.
Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 13:45 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dd3bd9dc47084195fcb3c1b371cb03046abb13ab , < 8eb57389d8ad91c67bf844f5aae4caef74b9091b (git)
Affected: dd3bd9dc47084195fcb3c1b371cb03046abb13ab , < c4246f1fe9f24f8dcd97887ed67d8fcfd91f4796 (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.10.11 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  "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 \u2014 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 \u2014 it runs during device probe \u2014 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\u0027s 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."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:39:06.428Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "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"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-46863",
        "datePublished": "2024-09-27T12:42:52.373Z",
        "dateReserved": "2024-09-11T15:12:18.293Z",
        "dateUpdated": "2026-08-05T11:39:06.428Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.