CVE-2024-47712 Information

Description

In the Linux kernel the following vulnerability has been resolved:

wifi: wilc1000: fix potential RCU dereference issue in wilc_parse_join_bss_param

In the wilc_parse_join_bss_param function the TSF field of the ies structure is accessed after the RCU read-side critical section is unlocked. According to RCU usage rules this is illegal. Reusing this pointer can lead to unpredictable behavior including accessing memory that has been updated or causing use-after-free issues.

This possible bug was identified using a static analysis tool developed by myself specifically designed to detect RCU-related issues.

To address this the TSF value is now stored in a local variable ies_tsf before the RCU lock is released. The param->tsf_lo field is then assigned using this local variable ensuring that the TSF value is safely accessed.

CVSS Vector

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

Reference

https://git.kernel.org/stable/c/557418e1704605a81c9e26732449f71b1d40ba1e https://git.kernel.org/stable/c/bf090f4fe935294361eabd9dc5a949fdd77d3d1b https://git.kernel.org/stable/c/b040b71d99ee5e17bb7a743dc01cbfcae8908ce1 https://git.kernel.org/stable/c/84398204c5df5aaf89453056cf0647cda9664d2b https://git.kernel.org/stable/c/2f944e6255c2fc1c9bd9ee32f6b14ee0b2a51eb5 https://git.kernel.org/stable/c/79510414a7626317f13cc9073244ab7a8deb3192 https://git.kernel.org/stable/c/6d7c6ae1efb1ff68bc01d79d94fdf0388f86cdd8

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5