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CVE-2026-74332 (GCVE-0-2026-74332)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:58 – Updated: 2026-08-17 05:45
VLAI
Title
ASoC: amd: acp-sdw-sof: Bound DAI link iteration
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: amd: acp-sdw-sof: Bound DAI link iteration create_sdw_dailinks() walks sof_dais until it finds an entry with initialised cleared, but sof_dais is allocated with exactly num_ends entries. If all entries are initialised, the loop reads past the end of the array. Pass the allocated entry count to create_sdw_dailinks() and stop before reading past the array.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6d8348ddc56ed43ba39d1e8adda13299201f32ed , < 0a5ff4000dd7a390139dd7823fef1de4963e490a (git)
Affected: 6d8348ddc56ed43ba39d1e8adda13299201f32ed , < 9e82497138abea7d5c6e65015663d907fbcbf6b4 (git)
Affected: 6d8348ddc56ed43ba39d1e8adda13299201f32ed , < 86a64c049873fe4d4a6a378e27a333ab5631c4b2 (git)
Affected: 6d8348ddc56ed43ba39d1e8adda13299201f32ed , < 4d992e63f52d58f52b724606c60ae7b37a1c582f (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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            "sound/soc/amd/acp/acp-sdw-sof-mach.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: amd: acp-sdw-sof: Bound DAI link iteration\n\ncreate_sdw_dailinks() walks sof_dais until it finds an entry with\ninitialised cleared, but sof_dais is allocated with exactly num_ends\nentries. If all entries are initialised, the loop reads past the end of\nthe array.\n\nPass the allocated entry count to create_sdw_dailinks() and stop before\nreading past the array."
        }
      ],
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            "baseSeverity": "HIGH",
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            "version": "3.1"
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              "value": "AV:L - The bug is in create_sdw_dailinks() called from mc_probe() during SOF AMD PCI probe and platform_device_register_data(\"amd_sof_sdw\"); there is no network, Bluetooth, or remote-packet path\u2014only onboard SoundWire topology from ACPI/firmware on AMD ACP63/70 laptops.\nAC:L - On affected AMD SOF SoundWire machines where every ACPI endpoint gets its own dailink (aggregated=0), all num_ends array slots are initialised and the unbounded while loop deterministically performs a slab out-of-bounds read on every probe, with no race or attacker-controlled memory layout required.\nPR:N - The vulnerable path runs automatically during kernel driver probe at boot with no authentication, capability, or userspace gate; snd_sof PCI binding and amd_sof_sdw machine registration occur from the PCI ID table without any privilege check on this code path.\nUI:N - Exploitation requires no victim action\u2014the out-of-bounds access occurs inside mc_probe() during automatic machine-driver registration before any ALSA device open, mount, or other user interaction.\nS:U - The out-of-bounds read and any resulting kernel fault or heap corruption stay within the host kernel audio driver security boundary; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - The loop reads the initialised field past the kmalloc sof_dais[num_ends] boundary (KASAN slab-out-of-bounds, read size 1); if adjacent slab data is non-zero the walk continues, interpreting out-of-bounds asoc_sdw_dailink structures and dereferencing garbage list_head endpoints in create_sdw_dailink().\nI:H - When the out-of-bounds initialised byte is non-zero, create_sdw_dailink() processes attacker-uncontrolled dailink metadata and advances the dai_links pointer beyond the devm_kcalloc(num_links) allocation, enabling out-of-bounds writes into adjacent kernel heap objects during DAI link construction.\nA:H - Continuing past the array causes list_for_each_entry() on uninitialised endpoint lists and wild-pointer dereferences that produce a kernel oops/panic during probe; even the minimal one-byte slab OOB read is a confirmed memory-safety violation that can destabilize the audio subsystem on every boot of affected hardware."
            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74332",
    "datePublished": "2026-08-15T05:58:25.112Z",
    "dateReserved": "2026-08-15T05:44:03.885Z",
    "dateUpdated": "2026-08-17T05:45:58.074Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-20T18:15:48+00:00",
      "cve": "CVE-2026-74332",
      "id": "CVE-2026-74332",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: amd: acp-sdw-sof: Bound DAI link iteration",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74332.json",
      "version": "3"
    }
  }
}



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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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.