FKIE_CVE-2021-47455

Vulnerability from fkie_nvd - Published: 2024-05-22 07:15 - Updated: 2025-11-03 18:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ptp: Fix possible memory leak in ptp_clock_register() I got memory leak as follows when doing fault injection test: unreferenced object 0xffff88800906c618 (size 8): comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (age 13.188s) hex dump (first 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0 [<0000000079f6e2ff>] kvasprintf+0xb5/0x150 [<0000000026aae54f>] kvasprintf_const+0x60/0x190 [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150 [<000000004e35abdd>] dev_set_name+0xc0/0x100 [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp] [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] When posix_clock_register() returns an error, the name allocated in dev_set_name() will be leaked, the put_device() should be used to give up the device reference, then the name will be freed in kobject_cleanup() and other memory will be freed in ptp_clock_release().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: Fix possible memory leak in ptp_clock_register()\n\nI got memory leak as follows when doing fault injection test:\n\nunreferenced object 0xffff88800906c618 (size 8):\n  comm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (age 13.188s)\n  hex dump (first 8 bytes):\n    70 74 70 30 00 00 00 00                          ptp0....\n  backtrace:\n    [\u003c00000000312ed458\u003e] __kmalloc_track_caller+0x19f/0x3a0\n    [\u003c0000000079f6e2ff\u003e] kvasprintf+0xb5/0x150\n    [\u003c0000000026aae54f\u003e] kvasprintf_const+0x60/0x190\n    [\u003c00000000f323a5f7\u003e] kobject_set_name_vargs+0x56/0x150\n    [\u003c000000004e35abdd\u003e] dev_set_name+0xc0/0x100\n    [\u003c00000000f20cfe25\u003e] ptp_clock_register+0x9f4/0xd30 [ptp]\n    [\u003c000000008bb9f0de\u003e] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\n\nWhen posix_clock_register() returns an error, the name allocated\nin dev_set_name() will be leaked, the put_device() should be used\nto give up the device reference, then the name will be freed in\nkobject_cleanup() and other memory will be freed in ptp_clock_release()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ptp: solucione una posible p\u00e9rdida de memoria en ptp_clock_register() Obtuve una p\u00e9rdida de memoria de la siguiente manera al realizar la prueba de inyecci\u00f3n de fallas: objeto sin referencia 0xffff88800906c618 (tama\u00f1o 8): comm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (edad 13,188 s) volcado hexadecimal (primeros 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [\u0026lt;00000000312ed458\u0026gt;] __kmalloc_track_caller+0x19f/0x3a0 [\u0026lt;0000 000079f6e2ff\u0026gt;] kvasprintf+0xb5 /0x150 [\u0026lt;0000000026aae54f\u0026gt;] kvasprintf_const+0x60/0x190 [\u0026lt;00000000f323a5f7\u0026gt;] kobject_set_name_vargs+0x56/0x150 [\u0026lt;000000004e35abdd\u0026gt;] dev_set_name+0xc0/0x100 0000000f20cfe25\u0026gt;] ptp_clock_register+0x9f4/0xd30 [ptp] [\u0026lt;000000008bb9f0de\u0026gt;] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] Cuando posix_clock_register() devuelve un error, el nombre asignado en dev_set_name() se filtrar\u00e1, se debe usar put_device() para renunciar a la referencia del dispositivo, luego el nombre se liberar\u00e1 kobject_cleanup() y otra memoria se liberar\u00e1n en ptp_clock_release()."
    }
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  "id": "CVE-2021-47455",
  "lastModified": "2025-11-03T18:15:39.480",
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          "attackVector": "LOCAL",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
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        "source": "nvd@nist.gov",
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  "published": "2024-05-22T07:15:10.530",
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  "vulnStatus": "Modified",
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