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CVE-2021-47065

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: rtw88: Fix array overrun in rtw_get_tx_power_params() Using a kernel with the Undefined Behaviour Sanity Checker (UBSAN) enable…

Published Feb 29, 2024CWE-129EPSS 0.24%

Overview

CVE-2021-47065 is a high-severity vulnerability. It was published on February 29, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

rtw88: Fix array overrun in rtw_get_tx_power_params()

Using a kernel with the Undefined Behaviour Sanity Checker (UBSAN) enabled, the

following array overrun is logged:

================================================================================

UBSAN: array-index-out-of-bounds in /home/finger/wireless-drivers-next/drivers/net/wireless/realtek/rtw88/phy.c:1789:34

index 5 is out of range for type 'u8 [5]'

CPU: 2 PID: 84 Comm: kworker/u16:3 Tainted: G O 5.12.0-rc5-00086-gd88bba47038e-dirty #651

Hardware name: TOSHIBA TECRA A50-A/TECRA A50-A, BIOS Version 4.50 09/29/2014

Workqueue: phy0 ieee80211_scan_work [mac80211]

Call Trace:

dump_stack+0x64/0x7c

ubsan_epilogue+0x5/0x40

__ubsan_handle_out_of_bounds.cold+0x43/0x48

rtw_get_tx_power_params+0x83a/drivers/net/wireless/realtek/rtw88/0xad0 [rtw_core]

? rtw_pci_read16+0x20/0x20 [rtw_pci]

? check_hw_ready+0x50/0x90 [rtw_core]

rtw_phy_get_tx_power_

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2ff25985ea9ccc6c9af2c77b0b49045adcc62e0eRefgit.kernel.org/stable/c/5f3dbced8eaa5c9ed7d6943f3fea99f235a6516aRefgit.kernel.org/stable/c/6b5aa0cf321c25f41e09a61c83ee4dc7ab9549cbRefgit.kernel.org/stable/c/95fb153c6027924cda3422120169d1890737f3a0Refgit.kernel.org/stable/c/9cd09722e18a08b6a3d68b8bccfac39ddc22434cRefgit.kernel.org/stable/c/2ff25985ea9ccc6c9af2c77b0b49045adcc62e0eRefgit.kernel.org/stable/c/5f3dbced8eaa5c9ed7d6943f3fea99f235a6516aRefgit.kernel.org/stable/c/6b5aa0cf321c25f41e09a61c83ee4dc7ab9549cbRefgit.kernel.org/stable/c/95fb153c6027924cda3422120169d1890737f3a0Refgit.kernel.org/stable/c/9cd09722e18a08b6a3d68b8bccfac39ddc22434c

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47065?

CVE-2021-47065 is a high-severity vulnerability. It was published on February 29, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47065?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47065?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47065?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47065 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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