CVE-2026-93803
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.
How to fix
- Linux Linuxbb18262c19feb690ddde58c70e3ad04bc6fe566e, 09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82, 2836a870f612a8a6d9e390d00fa2cf6c90aa5808, 0b61c465ea62063593bc9ac186871b69e58ae991, 062840bdc9ee06169b3c371bf66711f1d7ec0bf4, c54b643e9a0936d038921c547736574fd7382cea, 74ed3669f26803b1761c1f55403062bea44c3466 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < bb18262c19feb690ddde58c70e3ad04bc6fe566e, b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < 09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82, b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < 2836a870f612a8a6d9e390d00fa2cf6c90aa5808, b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < 0b61c465ea62063593bc9ac186871b69e58ae991, b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < 062840bdc9ee06169b3c371bf66711f1d7ec0bf4, b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < c54b643e9a0936d038921c547736574fd7382cea, b453872c35cfcbdbf5a794737817f7d4e7b1b579 ≤ v < 74ed3669f26803b1761c1f55403062bea44c3466, 2.6.14 | bb18262c19feb690ddde58c70e3ad04bc6fe566e, 09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82, 2836a870f612a8a6d9e390d00fa2cf6c90aa5808, 0b61c465ea62063593bc9ac186871b69e58ae991, 062840bdc9ee06169b3c371bf66711f1d7ec0bf4, c54b643e9a0936d038921c547736574fd7382cea, 74ed3669f26803b1761c1f55403062bea44c3466 |
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