Answer in brief
CVE-2026-74649 records a High severity (CVSS 8.8) vulnerability in staging: rtl8723bs: fix missing shared-key auth challenge length check. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <39ae1033071001af9bb4573ebdbb43bbbe88f749 || >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722 || >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <4ba402fd47009d20e51dbfc934abb562098ea35b || >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <87c2f073d2aaea041d531b8e579c47570b54b3b7 || >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <a28a4b0592e4a37ea471bc0d308513a93133ce7e || >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <6235b5156b48ed5d1ce3410d8f0b2fd67d30d944 || >=554c0a3abf216c991c5ebddcdb2c08689ecd290b <2c56ef658ac8c6bca36bc5574715e8f717207c6c | 39ae1033071001af9bb4573ebdbb43bbbe88f749, 4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722, 4ba402fd47009d20e51dbfc934abb562098ea35b, 87c2f073d2aaea041d531b8e579c47570b54b3b7, a28a4b0592e4a37ea471bc0d308513a93133ce7e, 6235b5156b48ed5d1ce3410d8f0b2fd67d30d944, 2c56ef658ac8c6bca36bc5574715e8f717207c6c |
| Linux/Linuxgeneric | 4.12 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.