GHSA-8R89-R77H-8GVM
Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-05-07 15:31In 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: 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'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.
{
"affected": [],
"aliases": [
"CVE-2022-49842"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-01T15:16:07Z",
"severity": "HIGH"
},
"details": "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.",
"id": "GHSA-8r89-r77h-8gvm",
"modified": "2025-05-07T15:31:24Z",
"published": "2025-05-01T15:31:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49842"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2ec3f558db343b045a7c7419cdbaec266b8ac1a7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/34eee4189bcebbd5f6a2ff25ef0cb893ad33d51e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/41fad4f712e081acdfde8b59847f9f66eaf407a0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ec27c53886c8963729885bcf2dd996eba2767a7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8d21554ec7680e9585fb852d933203c3db60dad1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/90bbdf30a51e42378cb23a312005a022794b8e1e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a3365e62239dc064019a244bde5686ac18527c22"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c5674bd073c0fd9f620ca550c5ff08d0d429bdd9"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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