CVE-2026-90017 (CVSS 7.1)

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.

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CVSS v3.1 Score

7.1

HIGH

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

References

Other References

https://git.kernel.org/stable/c/0b7f64c7bb9664777168768c6b44affb07dcbf24 https://git.kernel.org/stable/c/136f9a3ab87ded8aaf081425cfb2059659dd9023 https://git.kernel.org/stable/c/1410bce22351ba15d8e58287cbf09d55d7f21fc9 https://git.kernel.org/stable/c/15081ff835b29e456da29303b32efc436df04695 https://git.kernel.org/stable/c/310aaa8058d19cc431aedac0f5bb814e84479393 https://git.kernel.org/stable/c/a54fd1a44862d263df9f8bc17fca3620be31addb https://git.kernel.org/stable/c/b041e3f35e0d262d42a711094ab594634d72744a https://git.kernel.org/stable/c/ff917923f4fb9c83717ba135ee47d7e4c1567bb7

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-90017? +

CVE-2026-90017 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-90017? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-90017

Description

CVSS v3.1 Score

References

Other References

Frequently Asked Questions

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