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CVE-2026-43386: staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-08 · updated 2026-06-17
• Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie The current code checks 'i + 5 < in_len' at the end of the if statement. However, it accesses 'in_ie[i + 5]' before that check, which can lead to an out-of-bounds read. Move the length check to the beginning of the conditional to ensure the index is within bounds before accessing the array.

Affected products

• Linux kernel: from 4.12 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19 — fixed in 5.10.253, 5.15.203, 6.1.167, 6.12.78, 6.18.19, 6.19.9

How to fix

Upgrade to a fixed version: Linux kernel 5.10.253, 5.15.203, 6.1.167, 6.12.78. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/12cc6e8f8d4245b7b5a408c6fc8ab1d098d67020
• https://git.kernel.org/stable/c/209644e25757c499e1c1f08c071ea0386d4448b6
• https://git.kernel.org/stable/c/4dd2d9cf563c54e09d5f7eacf95c5b8f538b513b
• https://git.kernel.org/stable/c/6ff2243d5e05a5239e39d4ba61d96b0ea3bf7259
• https://git.kernel.org/stable/c/768f25613a9fe6766d15a4a72979657adfc1c6d8
• https://git.kernel.org/stable/c/a75281626fc8fa6dc6c9cc314ee423e8bc45203b
• https://git.kernel.org/stable/c/d97fc1b29513010b60fde874c7f0ba816744e18c
• https://git.kernel.org/stable/c/e14a1148f02e8cf1ca380d57e4b95ca36c97f45d

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