What’s Vulnerable › Vulnerabilities

CVE-2026-93803: wifi: libipw: fix key index receive bound checks

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: fix key index receive bound checks libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in both the software-decrypt key selection path and the hardware-decrypted IV/ICV strip path. In both places the existing guard only checks skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the byte at hdrlen + 3. Require hdrlen + 4 bytes before reading that item in both paths. This is a local source-boundary check only; it does not change the key index semantics.

Affected products

• Linux kernel: 2.6.14 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/062840bdc9ee06169b3c371bf66711f1d7ec0bf4
• https://git.kernel.org/stable/c/09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82
• https://git.kernel.org/stable/c/0b61c465ea62063593bc9ac186871b69e58ae991
• https://git.kernel.org/stable/c/2836a870f612a8a6d9e390d00fa2cf6c90aa5808
• https://git.kernel.org/stable/c/74ed3669f26803b1761c1f55403062bea44c3466
• https://git.kernel.org/stable/c/bb18262c19feb690ddde58c70e3ad04bc6fe566e
• https://git.kernel.org/stable/c/c54b643e9a0936d038921c547736574fd7382cea

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