{"id":"CVE-2021-47455","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-47455","generatedAt":"2026-10-27T19:05:07.366Z","title":"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…","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().","published":"2024-05-22T07:15:11.000Z","lastModified":"2026-06-17T04:17:31.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-401"],"affected":["linux/linux kernel"],"epss":{"score":0.00237,"percentile":0.14565,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-47455","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}