What is CVE-2023-53529?

CVE-2023-53529 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 5.2 onward and patched in 6.3.4 and 6.4. CVE-2023-53529 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53529?

CVE-2023-53529 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-2023-53529?

Yes, CVE-2023-53529 has been patched. Fixed versions include 6.3.4 and 6.4. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53529 actively exploited?

CVE-2023-53529 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-2023-53529

Medium

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: Fix memory leak in rtw88_usb Kmemleak shows the following leak arising from routine in the usb probe routine: unreferenced object 0xffff895cb29bba00 (size 512): comm "(udev-worker)", pid 534, jiffies 4294903932 (age 102751.088s) hex dump (first 32 bytes): 77 30 30 30 00 00 00 00 02 2f 2d 2b 30 00 00 00 w000...../-+0... 02 00 2a 28 00 00 00 00 ff 55 ff ff ff 00 00 00 ..*(.....U...... backtrace: [<ffffffff9265fa36>] kmalloc_trace+0x26/0x90 [<ffffffffc17eec41>] rtw_usb_probe+0x2f1/0x680 [rtw_usb] [<ffffffffc03e19fd>] usb_probe_interface+0xdd/0x2e0 [usbcore] [<ffffffff92b4f2fe>] really_probe+0x18e/0x3d0 [<ffffffff92b4f5b8>] __driver_probe_device+0x78/0x160 [<ffffffff92b4f6bf>] driver_probe_device+0x1f/0x90 [<ffffffff92b4f8df>] __driver_attach+0xbf/0x1b0 [<ffffffff92b4d350>] bus_for_each_dev+0x70/0xc0 [<ffffffff92b4e51e>] bus_add_driver+0x10e/0x210 [<ffffffff92b50935>] driver_register+0x55/0xf0 [<ffffffffc03e0708>] usb_register_driver+0x88/0x140 [usbcore] [<ffffffff92401153>] do_one_initcall+0x43/0x210 [<ffffffff9254f42a>] do_init_module+0x4a/0x200 [<ffffffff92551d1c>] __do_sys_finit_module+0xac/0x120 [<ffffffff92ee6626>] do_syscall_64+0x56/0x80 [<ffffffff9300006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 The leak was verified to be real by unloading the driver, which resulted in a dangling pointer to the allocation. The allocated memory is freed in rtw_usb_intf_deinit().

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-23

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-2023-53529 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 5.2 and later are affected. Fixed in 6.3.4, 6.4 and their respective stable series.

Affected from

≥ 5.2

Fixed in

✓ 6.3.4 6.3.x ✓ 6.4

References

2 total

Kernel Git
https://git.kernel.org/stable/c/59a3a312009723e3e5082899655fdcc420e2b47a

Patch
Kernel Git
https://git.kernel.org/stable/c/5bba1ad561a8b5bb14704d8f511cf10466336e3d

Patch

Details

CVE ID CVE-2023-53529

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53529?

CVE-2023-53529 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 5.2 onward and has been patched in 6.3.4 and 6.4. CVE-2023-53529 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53529?

CVE-2023-53529 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-2023-53529?

Yes. CVE-2023-53529 has been patched. Fixed versions include 6.3.4 and 6.4. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53529 actively exploited?

No. CVE-2023-53529 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.