CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of certain management action frames in the rtl8723bs driver, where insufficient validation of the frame length can lead to out-of-bounds reads. This flaw could be exploited by an attacker to read unintended memory, potentially leading to information disclosure or system instability. Organizations utilizing affected Linux kernel versions, particularly those relying on the rtl8723bs driver for wireless communication, should prioritize applying the patch to mitigate this risk.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() rtw_action_frame_parse() takes a frame_len parameter but never actually checks it before indexing into the frame body: const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); ... c = frame_body[0]; ... a = frame_body[1]; frame_body already points 24 bytes (sizeof(struct ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and frame_body[1] requires frame_len >= 26. A management action frame shorter than that (e.g. exactly 24 bytes, the minimum a malicious peer can send) causes a 1-2 byte out-of-bounds read. This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass attacker/user-influenced frame buffers and lengths straight through. Add the missing length check before frame_body is dereferenced.