CVE-2021-46924

Advisory lineage Upstream: 0 Downstream: 15
Modified
Published: 27 Feb 2024, 09:43
Last modified:11 May 2026, 13:44

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Feb 2024, 09:43
Published
Vulnerability first disclosed
11 May 2026, 13:44
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: NFC: st21nfca: Fix memory leak in device probe and remove 'phy->pending_skb' is alloced when device probe, but forgot to free in the error handling path and remove path, this cause memory leak as follows: unreferenced object 0xffff88800bc06800 (size 512): comm "8", pid 11775, jiffies 4295159829 (age 9.032s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450 [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0 [<000000005fea522c>] __alloc_skb+0x124/0x380 [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2 Fix it by freeing 'pending_skb' in error and remove.

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: 0.01%• Percentile: 2%

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

    ≥ 68957303f44a501af5cf37913208a2acaa6bcdf1, < 38c3e320e7ff46f2dc67bc5045333e63d9f8918d | ≥ 68957303f44a501af5cf37913208a2acaa6bcdf1, < a1e0080a35a16ce3808f7040fe0c3a8fdb052349 | ≥ 68957303f44a501af5cf37913208a2acaa6bcdf1, < 1cd4063dbc91cf7965d73a6a3855e2028cd4613b | ≥ 68957303f44a501af5cf37913208a2acaa6bcdf1, < e553265ea56482da5700f56319fda9ff53e7dcb4 | ≥ 68957303f44a501af5cf37913208a2acaa6bcdf1, < 238920381b8925d070d32d73cd9ce52ab29896fe | ≥ 68957303f44a501af5cf37913208a2acaa6bcdf1, < 1b9dadba502234eea7244879b8d5d126bfaf9f0c | 3.16

  • linux•linux_kernel

    ≥ 3.16.0, < 4.14.261 | ≥ 4.15.0, < 4.19.224 | ≥ 4.20.0, < 5.4.170 | ≥ 5.5.0, < 5.10.90 | ≥ 5.11.0, < 5.15.13

References (6)