What is CVE-2021-46924?

CVE-2021-46924 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 3.16 onward and patched in 4.14.261, 4.19.224, 5.4.170 and others. CVE-2021-46924 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-46924?

CVE-2021-46924 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-46924?

Yes, CVE-2021-46924 has been patched. Fixed versions include 4.14.261, 4.19.224, 5.4.170 and others. If you are running Linux kernel 3.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-46924 actively exploited?

CVE-2021-46924 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2021-46924

Medium

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.

Package Linux Kernel

Published 2024-02-27

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-401

CVE-2021-46924 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.16 and later are affected. Fixed in 4.14.261, 4.19.224, 5.4.170, 5.10.90, 5.15.13, 5.16 and their respective stable series.

Affected from

≥ 3.16

Fixed in

✓ 4.14.261 4.14.x ✓ 4.19.224 4.19.x ✓ 5.4.170 5.4.x ✓ 5.10.90 5.10.x ✓ 5.15.13 5.15.x ✓ 5.16

References

6 total

Kernel Git
https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c

Patch
Kernel Git
https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b

Patch
Kernel Git
https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe

Patch
Kernel Git
https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d

Patch
Kernel Git
https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2021-46924

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-27

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-46924?

CVE-2021-46924 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 3.16 onward and has been patched in 4.14.261, 4.19.224, 5.4.170 and others. CVE-2021-46924 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-46924?

CVE-2021-46924 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-46924?

Yes. CVE-2021-46924 has been patched. Fixed versions include 4.14.261, 4.19.224, 5.4.170 and others. If you are running Linux kernel 3.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-46924 actively exploited?

No. CVE-2021-46924 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.