CVE-2026-93803

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < bb18262c19feb690ddde58c70e3ad04bc6fe566eaffected
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < 09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82affected
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < 2836a870f612a8a6d9e390d00fa2cf6c90aa5808affected
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < 0b61c465ea62063593bc9ac186871b69e58ae991affected
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < 062840bdc9ee06169b3c371bf66711f1d7ec0bf4affected
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < c54b643e9a0936d038921c547736574fd7382ceaaffected
LinuxLinuxb453872c35cfcbdbf5a794737817f7d4e7b1b579 < 74ed3669f26803b1761c1f55403062bea44c3466affected
LinuxLinux2.6.14affected
LinuxLinux0 < 2.6.14unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References