CVE-2026-90017staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 15081ff835b29e456da29303b32efc436df04695; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 310aaa8058d19cc431aedac0f5bb814e84479393; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 1410bce22351ba15d8e58287cbf09d55d7f21fc9; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 0b7f64c7bb9664777168768c6b44affb07dcbf24; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 136f9a3ab87ded8aaf081425cfb2059659dd9023; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before b041e3f35e0d262d42a711094ab594634d72744a; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before a54fd1a44862d263df9f8bc17fca3620be31addb; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before ff917923f4fb9c83717ba135ee47d7e4c1567bb7 | CNA record |
References
- https://git.kernel.org/stable/c/15081ff835b29e456da29303b32efc436df04695
- https://git.kernel.org/stable/c/310aaa8058d19cc431aedac0f5bb814e84479393
- https://git.kernel.org/stable/c/1410bce22351ba15d8e58287cbf09d55d7f21fc9
- https://git.kernel.org/stable/c/0b7f64c7bb9664777168768c6b44affb07dcbf24
- https://git.kernel.org/stable/c/136f9a3ab87ded8aaf081425cfb2059659dd9023
- https://git.kernel.org/stable/c/b041e3f35e0d262d42a711094ab594634d72744a
- https://git.kernel.org/stable/c/a54fd1a44862d263df9f8bc17fca3620be31addb
- https://git.kernel.org/stable/c/ff917923f4fb9c83717ba135ee47d7e4c1567bb7
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.