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CVE-2022-49842 (GCVE-0-2022-49842)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:07
VLAI
Title
ASoC: core: Fix use-after-free in snd_soc_exit()
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: core: Fix use-after-free in snd_soc_exit() KASAN reports a use-after-free: BUG: KASAN: use-after-free in device_del+0xb5b/0xc60 Read of size 8 at addr ffff888008655050 by task rmmod/387 CPU: 2 PID: 387 Comm: rmmod Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: <TASK> dump_stack_lvl+0x79/0x9a print_report+0x17f/0x47b kasan_report+0xbb/0xf0 device_del+0xb5b/0xc60 platform_device_del.part.0+0x24/0x200 platform_device_unregister+0x2e/0x40 snd_soc_exit+0xa/0x22 [snd_soc_core] __do_sys_delete_module.constprop.0+0x34f/0x5b0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd ... </TASK> It's bacause in snd_soc_init(), snd_soc_util_init() is possble to fail, but its ret is ignored, which makes soc_dummy_dev unregistered twice. snd_soc_init() snd_soc_util_init() platform_device_register_simple(soc_dummy_dev) platform_driver_register() # fail platform_device_unregister(soc_dummy_dev) platform_driver_register() # success ... snd_soc_exit() snd_soc_util_exit() # soc_dummy_dev will be unregistered for second time To fix it, handle error and stop snd_soc_init() when util_init() fail. Also clean debugfs when util_init() or driver_register() fail.
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 2025-10-01 17:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < 41fad4f712e081acdfde8b59847f9f66eaf407a0 (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < 90bbdf30a51e42378cb23a312005a022794b8e1e (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < a3365e62239dc064019a244bde5686ac18527c22 (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < 2ec3f558db343b045a7c7419cdbaec266b8ac1a7 (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < 8d21554ec7680e9585fb852d933203c3db60dad1 (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < 34eee4189bcebbd5f6a2ff25ef0cb893ad33d51e (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < c5674bd073c0fd9f620ca550c5ff08d0d429bdd9 (git)
Affected: fb257897bf20c5f0e1df584bb5b874e811651263 , < 6ec27c53886c8963729885bcf2dd996eba2767a7 (git)
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Linux Linux Affected: 3.0
Unaffected: 0 , < 3.0 (semver)
Unaffected: 4.9.334 , ≤ 4.9.* (semver)
Unaffected: 4.14.300 , ≤ 4.14.* (semver)
Unaffected: 4.19.267 , ≤ 4.19.* (semver)
Unaffected: 5.4.225 , ≤ 5.4.* (semver)
Unaffected: 5.10.156 , ≤ 5.10.* (semver)
Unaffected: 5.15.80 , ≤ 5.15.* (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: core: Fix use-after-free in snd_soc_exit()\n\nKASAN reports a use-after-free:\n\nBUG: KASAN: use-after-free in device_del+0xb5b/0xc60\nRead of size 8 at addr ffff888008655050 by task rmmod/387\nCPU: 2 PID: 387 Comm: rmmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x79/0x9a\nprint_report+0x17f/0x47b\nkasan_report+0xbb/0xf0\ndevice_del+0xb5b/0xc60\nplatform_device_del.part.0+0x24/0x200\nplatform_device_unregister+0x2e/0x40\nsnd_soc_exit+0xa/0x22 [snd_soc_core]\n__do_sys_delete_module.constprop.0+0x34f/0x5b0\ndo_syscall_64+0x3a/0x90\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n...\n\u003c/TASK\u003e\n\nIt\u0027s bacause in snd_soc_init(), snd_soc_util_init() is possble to fail,\nbut its ret is ignored, which makes soc_dummy_dev unregistered twice.\n\nsnd_soc_init()\n    snd_soc_util_init()\n        platform_device_register_simple(soc_dummy_dev)\n        platform_driver_register() # fail\n    \tplatform_device_unregister(soc_dummy_dev)\n    platform_driver_register() # success\n...\nsnd_soc_exit()\n    snd_soc_util_exit()\n    # soc_dummy_dev will be unregistered for second time\n\nTo fix it, handle error and stop snd_soc_init() when util_init() fail.\nAlso clean debugfs when util_init() or driver_register() fail."
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: core: Fix use-after-free in snd_soc_exit()\n\nKASAN reports a use-after-free:\n\nBUG: KASAN: use-after-free in device_del+0xb5b/0xc60\nRead of size 8 at addr ffff888008655050 by task rmmod/387\nCPU: 2 PID: 387 Comm: rmmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x79/0x9a\nprint_report+0x17f/0x47b\nkasan_report+0xbb/0xf0\ndevice_del+0xb5b/0xc60\nplatform_device_del.part.0+0x24/0x200\nplatform_device_unregister+0x2e/0x40\nsnd_soc_exit+0xa/0x22 [snd_soc_core]\n__do_sys_delete_module.constprop.0+0x34f/0x5b0\ndo_syscall_64+0x3a/0x90\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n...\n\u003c/TASK\u003e\n\nIt\u0027s bacause in snd_soc_init(), snd_soc_util_init() is possble to fail,\nbut its ret is ignored, which makes soc_dummy_dev unregistered twice.\n\nsnd_soc_init()\n    snd_soc_util_init()\n        platform_device_register_simple(soc_dummy_dev)\n        platform_driver_register() # fail\n    \tplatform_device_unregister(soc_dummy_dev)\n    platform_driver_register() # success\n...\nsnd_soc_exit()\n    snd_soc_util_exit()\n    # soc_dummy_dev will be unregistered for second time\n\nTo fix it, handle error and stop snd_soc_init() when util_init() fail.\nAlso clean debugfs when util_init() or driver_register() fail."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ASoC: n\u00facleo: Se corrige el use-after-free en snd_soc_exit() KASAN informa un use-after-free: ERROR: KASAN: use-after-free en device_del+0xb5b/0xc60 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff888008655050 por la tarea rmmod/387 CPU: 2 PID: 387 Comm: rmmod Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) Rastreo de llamadas:  dump_stack_lvl+0x79/0x9a print_report+0x17f/0x47b kasan_report+0xbb/0xf0 device_del+0xb5b/0xc60 platform_device_del.part.0+0x24/0x200 platform_device_unregister+0x2e/0x40 snd_soc_exit+0xa/0x22 [snd_soc_core] __do_sys_delete_module.constprop.0+0x34f/0x5b0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd ...  It\u0027s bacause in snd_soc_init(), snd_soc_util_init() is possble to fail, but its ret is ignored, which makes soc_dummy_dev unregistered twice. snd_soc_init() snd_soc_util_init() platform_device_register_simple(soc_dummy_dev) platform_driver_register() # fail platform_device_unregister(soc_dummy_dev) platform_driver_register() # success ... snd_soc_exit() snd_soc_util_exit() # soc_dummy_dev will be unregistered for second time To fix it, handle error and stop snd_soc_init() when util_init() fail. Also clean debugfs when util_init() or driver_register() fail. "
          }
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        "id": "CVE-2022-49842",
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      "current_release_date": "2026-06-29T21:19:04+00:00",
      "cve": "CVE-2022-49842",
      "id": "CVE-2022-49842",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: core: Fix use-after-free in snd_soc_exit()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49842.json",
      "version": "3"
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: core: Fix use-after-free in snd_soc_exit()\n\nKASAN reports a use-after-free:\n\nBUG: KASAN: use-after-free in device_del+0xb5b/0xc60\nRead of size 8 at addr ffff888008655050 by task rmmod/387\nCPU: 2 PID: 387 Comm: rmmod\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x79/0x9a\nprint_report+0x17f/0x47b\nkasan_report+0xbb/0xf0\ndevice_del+0xb5b/0xc60\nplatform_device_del.part.0+0x24/0x200\nplatform_device_unregister+0x2e/0x40\nsnd_soc_exit+0xa/0x22 [snd_soc_core]\n__do_sys_delete_module.constprop.0+0x34f/0x5b0\ndo_syscall_64+0x3a/0x90\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n...\n\u003c/TASK\u003e\n\nIt\u0027s bacause in snd_soc_init(), snd_soc_util_init() is possble to fail,\nbut its ret is ignored, which makes soc_dummy_dev unregistered twice.\n\nsnd_soc_init()\n    snd_soc_util_init()\n        platform_device_register_simple(soc_dummy_dev)\n        platform_driver_register() # fail\n    \tplatform_device_unregister(soc_dummy_dev)\n    platform_driver_register() # success\n...\nsnd_soc_exit()\n    snd_soc_util_exit()\n    # soc_dummy_dev will be unregistered for second time\n\nTo fix it, handle error and stop snd_soc_init() when util_init() fail.\nAlso clean debugfs when util_init() or driver_register() fail."
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}



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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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  • 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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  • 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.


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