{"cve":"CVE-2021-47455","nvd":{"published":"2024-05-22T07:15:10.530","modified":"2026-06-17T04:17:30.790","status":"Modified","description":"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    [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0\n    [<0000000079f6e2ff>] kvasprintf+0xb5/0x150\n    [<0000000026aae54f>] kvasprintf_const+0x60/0x190\n    [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150\n    [<000000004e35abdd>] dev_set_name+0xc0/0x100\n    [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp]\n    [<000000008bb9f0de>] 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().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0","https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8","https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524","https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0","https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47455","score":0.00237,"percentile":0.14747,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}