GHSA-2R2X-3JH4-CHHV
Vulnerability from github – Published: 2024-05-22 09:31 – Updated: 2025-11-03 18:31In 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().
{
"affected": [],
"aliases": [
"CVE-2021-47455"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-22T07:15:10Z",
"severity": "MODERATE"
},
"details": "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().",
"id": "GHSA-2r2x-3jh4-chhv",
"modified": "2025-11-03T18:31:14Z",
"published": "2024-05-22T09:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47455"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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