CVE-2021-47455

Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 22 May 2024, 06:19
Last modified:23 May 2026, 15:20

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 May 2024, 06:19
Published
Vulnerability first disclosed
23 May 2026, 15:20
Last Modified
Vulnerability information updated

Description

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().

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ a33121e5487b424339636b25c35d3a180eaa5f5e, < f1c96d8085588e1b997a96214b409ac3be20b524 | ≥ a33121e5487b424339636b25c35d3a180eaa5f5e, < 95c0a0c5ec8839f8f21672be786e87a100319ca8 | ≥ a33121e5487b424339636b25c35d3a180eaa5f5e, < 4225fea1cb28370086e17e82c0f69bec2779dca0 | 5230ef61882d2d14deb846eb6b48370694816e4c | 6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57 | 89e8fc989feaac00bf1a7f9a766289422e2f5768 | 2dece4d6d13fe179ee3a5991811712725a56e2f7 | 0393b8720128d5b39db8523e5bfbfc689f18c37c | bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad | ≥ 3.16.83, < 3.17 | ≥ 4.4.224, < 4.5 | ≥ 4.9.224, < 4.10 | ≥ 4.14.162, < 4.15 | ≥ 4.19.93, < 4.20 | ≥ 5.4.8, < 5.5 | 5.5

  • linux•linux_kernel

    ≥ 3.16.83, < 3.17 | ≥ 4.4.224, < 4.5 | ≥ 4.9.224, < 4.10 | ≥ 4.14.162, < 4.15 | ≥ 4.19.93, < 4.20 | ≥ 5.4.8, < 5.14.15 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3 | 5.15:rc4 | 5.15:rc5 | 5.15:rc6

References (4)