Executive Summary

Informations
Name CVE-2021-46924 First vendor Publication 2024-02-27
Vendor Cve Last vendor Modification 2024-04-10

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46924

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-401 Failure to Release Memory Before Removing Last Reference ('Memory Leak')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7
Os 3447

Sources (Detail)

https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c
https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b
https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe
https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d
https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349
https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4
Source Url

Alert History

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0
1
2
Date Informations
2024-04-10 21:27:37
  • Multiple Updates
2024-02-27 17:27:29
  • Multiple Updates
2024-02-27 13:27:26
  • First insertion