CVE-2022-49291 (GCVE-0-2022-49291)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:56 – Updated: 2026-08-05 08:54
VLAI
Title
ALSA: pcm: Fix races among concurrent hw_params and hw_free calls
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent hw_params and hw_free calls Currently we have neither proper check nor protection against the concurrent calls of PCM hw_params and hw_free ioctls, which may result in a UAF. Since the existing PCM stream lock can't be used for protecting the whole ioctl operations, we need a new mutex to protect those racy calls. This patch introduced a new mutex, runtime->buffer_mutex, and applies it to both hw_params and hw_free ioctl code paths. Along with it, the both functions are slightly modified (the mmap_count check is moved into the state-check block) for code simplicity.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 17:58 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a42aa926843acca96c0dfbde2e835b8137f2f092 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fbeb492694ce0441053de57699e1e2b7bc148a69 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 33061d0fba51d2bf70a2ef9645f703c33fe8e438 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0090c13cbbdffd7da079ac56f80373a9a1be0bf8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1bbf82d9f961414d6c76a08f7f843ea068e0ab7b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 92ee3c60ec9fe64404dc035e7c41277d74aa26cb (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.14.279 , ≤ 4.14.* (semver)
Unaffected: 4.19.243 , ≤ 4.19.* (semver)
Unaffected: 5.4.193 , ≤ 5.4.* (semver)
Unaffected: 5.10.109 , ≤ 5.10.* (semver)
Unaffected: 5.15.32 , ≤ 5.15.* (semver)
Unaffected: 5.16.18 , ≤ 5.16.* (semver)
Unaffected: 5.17.1 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Fix races among concurrent hw_params and hw_free calls\n\nCurrently we have neither proper check nor protection against the\nconcurrent calls of PCM hw_params and hw_free ioctls, which may result\nin a UAF.  Since the existing PCM stream lock can\u0027t be used for\nprotecting the whole ioctl operations, we need a new mutex to protect\nthose racy calls.\n\nThis patch introduced a new mutex, runtime-\u003ebuffer_mutex, and applies\nit to both hw_params and hw_free ioctl code paths.  Along with it, the\nboth functions are slightly modified (the mmap_count check is moved\ninto the state-check block) for code simplicity."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: pcm: Arregla ejecuciones entre llamadas hw_params y hw_free concurrentes Actualmente no tenemos ni la comprobaci\u00f3n adecuada ni la protecci\u00f3n contra las llamadas concurrentes de las ioctl hw_params y hw_free de PCM, lo que puede resultar en un UAF. Dado que el bloqueo de flujo de PCM existente no se puede utilizar para proteger todas las operaciones ioctl, necesitamos un nuevo mutex para proteger esas llamadas con ejecuciones. Este parche introdujo un nuevo mutex, runtime-\u0026gt;buffer_mutex, y lo aplica a las rutas de c\u00f3digo de ioctl hw_params y hw_free. Junto con \u00e9l, ambas funciones se modifican ligeramente (la comprobaci\u00f3n mmap_count se mueve al bloque state-check) para simplificar el c\u00f3digo."
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      "version": "56"
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
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            "title": "CISA ADP Vulnrichment"
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}



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