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

What is CVE-2026-43386?

CVE-2026-43386 is a high-severity memory corruption vulnerability in Linux kernel, published on 8 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2026-43386?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-43386?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-43386 being exploited?

There is no known exploitation of CVE-2026-43386 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-43386, DEBIAN-CVE-2026-43386, GHSA-f55f-7vqj-q3f7, ROOT-OS-DEBIAN-11-CVE-2026-43386, ROOT-OS-UBUNTU-2204-CVE-2026-43386, ROOT-OS-UBUNTU-2404-CVE-2026-43386 and 1 more.