CVE-2026-64440
CVE CVE-2026-64440EUVD EUVD-2026-48784Published 2026-07-25T08:51:13.000ZLast changed 2026-08-05T12:42:04.000ZCVSS 8.1
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB write in HT_caps_handler() HT_caps_handler() iterates pIE->length bytes and writes into HT_caps.u.HT_cap[], which is a fixed 26-byte array (sizeof struct HT_caps_element). Because pIE->length is a raw u8 from an over-the-air 802.11 AssocResponse frame and is never validated, a malicious AP can set it up to 255, causing up to 229 bytes of out-of-bounds writes into adjacent fields of struct mlme_ext_info. Truncate the iteration count to the size of HT_caps.u.HT_cap using umin() so that data from a longer-than-expected IE is silently ignored rather than written out of bounds, preserving interoperability with APs that pad the element. An early return on oversized IEs was considered but rejected: it would bypass the pmlmeinfo->HT_caps_enable = 1 assignment that precedes the loop, silently disabling HT mode for APs that append extra bytes to the HT Capabilities IE.
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 554c0a3abf216c991c5ebddcdb2c08689ecd290b <6f91621fc45025ad3c0be796b70e6e4cee22fc69; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <918537a0fbed85aab61fa28ad75e6279070610c9; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <bb3b942da4123b55d1cacf19d1a7d5ba15dbf83a; patch: 7.1.4; patch: 6.12.96; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <37f642d47c3648a707df3ceb092eee1adffbfd28; patch: 7.2-rc3; 4.12; patch: 0; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <8c872b47c7fc32e95e0da1db7512388794adcd69; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <225b6d3fc7e99ac3d20b6c861d1e47d24e7ea31d; patch: 6.6.145; patch: 6.18.39; 554c0a3abf216c991c5ebddcdb2c08689ecd290b <f8001e1a516ba3b495728c65b61f799cbfad6bd0; patch: 5.15.212; patch: 6.1.178
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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