What’s Vulnerable › Vulnerabilities

CVE-2026-43267: wifi: rtw89: fix potential zero beacon interval in beacon tracking

• Severity: medium (CVSS 5.5 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: 2026-05-06 · updated 2026-06-17
• Weakness: CWE-369

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: fix potential zero beacon interval in beacon tracking During fuzz testing, it was discovered that bss_conf->beacon_int might be zero, which could result in a division by zero error in subsequent calculations. Set a default value of 100 TU if the interval is zero to ensure stability.

Affected products

• Linux kernel: from 6.18 before 6.18.16; from 6.19 before 6.19.6 — fixed in 6.18.16, 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 6.18.16, 6.19.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1260bee01493126cf9c872b6ca2af261173baa6d
• https://git.kernel.org/stable/c/e00c9a4ec84c0bb067833b34202f457badbbc1c1
• https://git.kernel.org/stable/c/eb57be32f438c57c88d6ce756101c1dfbcc03bba

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