CVE-2026-74649

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> staging: rtl8723bs: fix missing shared-key auth challenge length check<br /> <br /> The WEP shared-key authentication handler uses the challenge-text<br /> element&amp;#39;s attacker-controlled length without checking it against the<br /> fixed 128-byte chg_txt buffer.<br /> <br /> In OnAuthClient() the length from rtw_get_ie() - up to 255 - is used<br /> to perform memcpy() into the 128-byte pmlmeinfo-&gt;chg_txt, so a<br /> malicious AP sending a malformed WLAN_EID_CHALLENGE element can<br /> overflow/underfill chg_txt by up to 127 bytes. It is reachable over the<br /> air, before association, during shared-key authentication. In the case<br /> of an overflow, the driver can write out of bounds. In the case of an<br /> underfill, the driver can echo stale buffer memory.<br /> <br /> The challenge text is defined to be exactly 128 octets, which is<br /> already provided as the WLAN_AUTH_CHALLENGE_LEN define; require the<br /> element to be exactly that length before use.