CVE-2026-74649
CVE CVE-2026-74649EUVD EUVD-2026-64586Published 2026-08-22T15:32:25.000ZLast changed 2026-08-25T05:41:08.000ZCVSS 8.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix missing shared-key auth challenge length check The WEP shared-key authentication handler uses the challenge-text element's attacker-controlled length without checking it against the fixed 128-byte chg_txt buffer. In OnAuthClient() the length from rtw_get_ie() - up to 255 - is used to perform memcpy() into the 128-byte pmlmeinfo->chg_txt, so a malicious AP sending a malformed WLAN_EID_CHALLENGE element can overflow/underfill chg_txt by up to 127 bytes. It is reachable over the air, before association, during shared-key authentication. In the case of an overflow, the driver can write out of bounds. In the case of an underfill, the driver can echo stale buffer memory. The challenge text is defined to be exactly 128 octets, which is already provided as the WLAN_AUTH_CHALLENGE_LEN define; require the element to be exactly that length before use.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.12.104; patch: 6.18.45; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <4ba402fd47009d20e51dbfc934abb562098ea35b; patch: 6.1.183; patch: 0; patch: 6.6.152; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <2c56ef658ac8c6bca36bc5574715e8f717207c6c; 4.12; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <39ae1033071001af9bb4573ebdbb43bbbe88f749; patch: 5.15.216; patch: 7.2; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <87c2f073d2aaea041d531b8e579c47570b54b3b7; patch: 7.1.9; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <a28a4b0592e4a37ea471bc0d308513a93133ce7e; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <6235b5156b48ed5d1ce3410d8f0b2fd67d30d944
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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