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CVE-2026-90017

HIGHCVSS 7.1/10

Last modified

CVE-2026-90017 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.

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.

Metrics

CVSS 3.1
7.1/10

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

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 15081ff835b29e456da29303b32efc436df04695; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 310aaa8058d19cc431aedac0f5bb814e84479393; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 1410bce22351ba15d8e58287cbf09d55d7f21fc9; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 0b7f64c7bb9664777168768c6b44affb07dcbf24; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 136f9a3ab87ded8aaf081425cfb2059659dd9023; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < b041e3f35e0d262d42a711094ab594634d72744a; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < a54fd1a44862d263df9f8bc17fca3620be31addb; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < ff917923f4fb9c83717ba135ee47d7e4c1567bb7
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90017?
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.
How severe is CVE-2026-90017?
CVE-2026-90017 has a CVSS score of 7.1/10 (HIGH severity).
How do I fix CVE-2026-90017?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST