CVE-2023-54096 (GCVE-0-2023-54096)
Vulnerability from cvelistv5
Published
2025-12-24 13:06
Modified
2026-08-05 09:17
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: soundwire: fix enumeration completion The soundwire subsystem uses two completion structures that allow drivers to wait for soundwire device to become enumerated on the bus and initialised by their drivers, respectively. The code implementing the signalling is currently broken as it does not signal all current and future waiters and also uses the wrong reinitialisation function, which can potentially lead to memory corruption if there are still waiters on the queue. Not signalling future waiters specifically breaks sound card probe deferrals as codec drivers can not tell that the soundwire device is already attached when being reprobed. Some codec runtime PM implementations suffer from similar problems as waiting for enumeration during resume can also timeout despite the device already having been enumerated.
References
Impacted products
Vendor Product Version
Linux Linux Version: fb9469e54fa7a7b6a8137c40ae66c41b8d0ab175
Version: fb9469e54fa7a7b6a8137c40ae66c41b8d0ab175
Version: fb9469e54fa7a7b6a8137c40ae66c41b8d0ab175
Version: fb9469e54fa7a7b6a8137c40ae66c41b8d0ab175
Version: fb9469e54fa7a7b6a8137c40ae66c41b8d0ab175
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/soundwire/bus.c"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "status": "unaffected",
              "version": "5.15.126",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.43",
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              "version": "6.4.8",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsoundwire: fix enumeration completion\n\nThe soundwire subsystem uses two completion structures that allow\ndrivers to wait for soundwire device to become enumerated on the bus and\ninitialised by their drivers, respectively.\n\nThe code implementing the signalling is currently broken as it does not\nsignal all current and future waiters and also uses the wrong\nreinitialisation function, which can potentially lead to memory\ncorruption if there are still waiters on the queue.\n\nNot signalling future waiters specifically breaks sound card probe\ndeferrals as codec drivers can not tell that the soundwire device is\nalready attached when being reprobed. Some codec runtime PM\nimplementations suffer from similar problems as waiting for enumeration\nduring resume can also timeout despite the device already having been\nenumerated."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is the in-kernel SoundWire bus enumeration path, reached through local runtime-PM suspend/resume cycles of the audio link driven by opening and closing PCM devices under /dev/snd. There is no network-facing path, and SoundWire peripherals are board-soldered so no physical hot-plug is involved.\nAC:L - The missed-wakeup half of the bug is deterministic \u2014 complete() releases exactly one waiter, so any subsequent waiter (deferred re-probe, runtime resume) reliably blocks to its multi-second timeout and fails with -ETIMEDOUT. For the corruption half the attacker controls both sides of the race by repeatedly cycling link runtime PM, which simultaneously generates the UNATTACHED init_completion() and the codec-side wait_for_completion_timeout() waiters.\nPR:L - An unprivileged local user with ordinary sound-device access (audio group or logind ACLs on /dev/snd, the default for desktop, laptop and Android/Qualcomm sessions) can drive the PCM open/close cycles that trigger link runtime suspend and resume. No CAP_SYS_ADMIN or root is required to reach the path.\nUI:N - The attacker\u0027s own PCM open/close activity drives the runtime-PM transitions and the codec resume waiters; no action by any other user is required.\nS:U - The corruption and the missed wakeups are confined to kernel memory and kernel tasks within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Resetting a live swait_queue_head\u0027s list and spinlock with waiters queued yields cross-stack writes through stale list pointers and a wake path dereferencing an attacker-influenceable curr-\u003etask, memory corruption that can be leveraged to disclose kernel memory. The commit explicitly acknowledges the memory-corruption potential.\nI:H - The orphaned stack-allocated swait_queue entries cause list_del_init() to write through stale prev/next pointers into other tasks\u0027 kernel stacks, and the reset-while-held raw spinlock permits concurrent list mutation \u2014 a write primitive usable for control-flow hijacking.\nA:H - Guaranteed missed wakeups stall codec probe and resume paths for seconds under PM locks and fail them with -ETIMEDOUT, leaving the sound card non-functional, while the wait-queue list and lock corruption produces oopses and hangs."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:17:14.522Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/48d1d0ce0782f995fda678508fdae35c5e9593f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/a36b522767f3a72688893a472e80c9aa03e67eda"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1d54962a63b6ec04ed0204a3ecca942fde3a6fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/c5265691cd065464d795de5666dcfb89c26b9bc1"
        },
        {
          "url": "https://git.kernel.org/stable/c/c40d6b3249b11d60e09d81530588f56233d9aa44"
        }
      ],
      "title": "soundwire: fix enumeration completion",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54096",
    "datePublished": "2025-12-24T13:06:23.828Z",
    "dateReserved": "2025-12-24T13:02:52.516Z",
    "dateUpdated": "2026-08-05T09:17:14.522Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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