staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie() rtw_restruct_wmm_ie() scans in_ie for a WMM IE with: while (i < in_len) { ... if (i + 5 < in_len && in_ie[i] == 0xDD && ...) { ... break; } i += (in_ie[i + 1] + 2); /* to the next IE element */ } When the "i + 5 < in_len" match check fails simply because i is within 5 bytes of the end of the buffer (i.e. no WMM IE was found near the tail of in_ie), execution falls through to "i += (in_ie[i + 1] + 2)", which reads in_ie[i + 1]. If i == in_len - 1 at that point, this is a 1-byte out-of-bounds read of an attacker-influenced IE buffer built from association/scan data. Commit a75281626fc8f ("staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie") added the "i + 5 < in_len" guard to the match condition itself, but did not add an equivalent guard before the fallthrough advance, so the same class of OOB read remained reachable through the non-matching path. Add an explicit bounds check before advancing to the next IE.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.112, 6.18.52, 7.2.5, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90016
- 2026-10-03 Alias added: GHSA-54jr-3vx9-2c5p
- 2026-10-03 Fix available: Linux/[email protected], Linux/Linux@e63b72c5d7336981dfc05e5cb92becff29dfea00 · CNA
- 2026-10-03 1 new reference · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@716850842d2f103f915fe7c857ff1a0a036491b4 · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Fix available: Linux/Linux@0c1f8bada613edbd810d010996d36159092576d5, Linux/[email protected], Linux/[email protected] +3 · CNA
- 2026-10-30 3 new references · CNA
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/0c1f8bada613edbd810d010996d36159092576d5
- https://git.kernel.org/stable/c/55034fa38bd8b302ceb32c15e8a98298f56f629b
- https://git.kernel.org/stable/c/a8d76480d1abbbf617c2d6d9f60bf95ab45cff04
- https://git.kernel.org/stable/c/716850842d2f103f915fe7c857ff1a0a036491b4
- https://git.kernel.org/stable/c/e63b72c5d7336981dfc05e5cb92becff29dfea00
- https://git.kernel.org/stable/c/4420cc71841b50e31a7868ef7acb011c0e08d294
- https://git.kernel.org/stable/c/fd19b8895f8a91087e8a62f1e27b128025dabb95
- https://git.kernel.org/stable/c/28a289beaf226b30b1e6e7d7b1a2946fe2d6e852
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Sources
- CVE-2026-90016 · CVE Program
- CVE-2026-90016 · NVD
- FIRST EPSS
- GHSA-54jr-3vx9-2c5p · GitHub Advisory Database · CC BY 4.0
- CVE-2026-90016 · Red Hat security data · CC BY 4.0
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