CVE-2021-46924
Linux Kernel NFC st21nfca Memory Leak Vulnerability
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.
INFO
Published Date :
Feb. 27, 2024, 10:15 a.m.
Last Modified :
April 10, 2024, 3:23 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-46924.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-46924 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46924 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Apr. 10, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c No Types Assigned https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c Patch Changed Reference Type https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b No Types Assigned https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b Patch Changed Reference Type https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe No Types Assigned https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe Patch Changed Reference Type https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d No Types Assigned https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d Patch Changed Reference Type https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349 No Types Assigned https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349 Patch Changed Reference Type https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4 No Types Assigned https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4 Patch Added CWE NIST CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.16.0 up to (excluding) 4.14.261 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15.0 up to (excluding) 4.19.224 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20.0 up to (excluding) 5.4.170 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5.0 up to (excluding) 5.10.90 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11.0 up to (excluding) 5.15.13 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 27, 2024
Action Type Old Value New Value Added 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. Added Reference Linux https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46924 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-46924
weaknesses.