CVE-2026-64481 (GCVE-0-2026-64481)
Vulnerability from cvelistv5
Published
2026-07-25 08:51
Modified
2026-08-17 04:56
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: ALSA: hda/cs35l41: Fix firmware load work teardown cs35l41_hda creates ALSA controls whose private data points at the cs35l41_hda object. The firmware load control can also queue fw_load_work. Those controls are not removed on component unbind, and device remove only cancels fw_load_work through cs35l41_remove_dsp(). That helper is skipped when halo_initialized is false. With firmware_autostart disabled, a firmware load can be requested before the DSP has been initialized. If the component or device is removed before the queued work runs, the worker can run after teardown and dereference driver state that is no longer valid. Track the created controls and remove them on unbind so no new control callback can reach the driver data or queue more work. Then cancel fw_load_work to drain any request that was already queued. Also cancel the work unconditionally during device remove before runtime PM teardown.
References
Impacted products
Vendor Product Version
Linux Linux Version: 47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8
Version: 47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8
Version: 47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8
Version: 47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "sound/hda/codecs/side-codecs/cs35l41_hda.c",
            "sound/hda/codecs/side-codecs/cs35l41_hda.h"
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          "programFiles": [
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            "sound/hda/codecs/side-codecs/cs35l41_hda.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "6.12.97",
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              "version": "6.18.39",
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              "version": "7.1.4",
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
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          "nodes": [
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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\nALSA: hda/cs35l41: Fix firmware load work teardown\n\ncs35l41_hda creates ALSA controls whose private data points at the\ncs35l41_hda object. The firmware load control can also queue\nfw_load_work.\n\nThose controls are not removed on component unbind, and device remove\nonly cancels fw_load_work through cs35l41_remove_dsp(). That helper is\nskipped when halo_initialized is false. With firmware_autostart\ndisabled, a firmware load can be requested before the DSP has been\ninitialized. If the component or device is removed before the queued\nwork runs, the worker can run after teardown and dereference driver\nstate that is no longer valid.\n\nTrack the created controls and remove them on unbind so no new control\ncallback can reach the driver data or queue more work. Then cancel\nfw_load_work to drain any request that was already queued. Also cancel\nthe work unconditionally during device remove before runtime PM teardown."
        }
      ],
      "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 - An attacker reaches the vulnerable callbacks through ALSA control ioctls on /dev/snd/controlC*. No network or physical protocol directly exposes this path.\nAC:L - After teardown, stale controls can repeatedly dereference the freed object or queue its embedded work item, so exploitation does not require winning a narrow race. A queued work_struct also remains directly usable after its containing allocation is freed.\nPR:L - An unprivileged user with ordinary audio-device access can invoke the control callbacks. The ioctl path contains no capability, namespace, or administrative privilege check.\nUI:N - Exploitation requires no victim to open content or perform an interactive action.\nS:U - The vulnerable driver and the affected kernel resources are governed by the same kernel security authority.\nC:H - The heap use-after-free permits attacker-influenced reuse and disclosure of freed kernel object contents, potentially supporting arbitrary kernel memory reads.\nI:H - The freed object embeds mutable workqueue list state and a function pointer that is subsequently invoked, making kernel memory corruption and control-flow hijacking defensible.\nA:H - Stale control accesses or corrupted queued work can cause a kernel oops, panic, or workqueue corruption, resulting in complete system unavailability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:56:28.073Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8947215c0136c9d905e4a46d824824f8b48a2e5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce0a903d0591e3e2c790c5b628802b08d1b287cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/d6a40a4d083ef74d00c8f9516cb5ff07ac70720b"
        },
        {
          "url": "https://git.kernel.org/stable/c/b65020d5398f499c09498c9786dba6d67ae57664"
        }
      ],
      "title": "ALSA: hda/cs35l41: Fix firmware load work teardown",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64481",
    "datePublished": "2026-07-25T08:51:42.430Z",
    "dateReserved": "2026-07-19T15:36:31.791Z",
    "dateUpdated": "2026-08-17T04:56:28.073Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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