CVE-2026-64126
CVE CVE-2026-64126EUVD EUVD-2026-45811Published 2026-07-19T15:40:23.000ZLast changed 2026-08-05T12:39:32.000ZCVSS 7.3
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate Add Extended Advertising Data length MGMT_OP_ADD_EXT_ADV_DATA is registered as a variable-length command, with MGMT_ADD_EXT_ADV_DATA_SIZE as the fixed header size. The handler then uses cp->adv_data_len and cp->scan_rsp_len to validate and copy cp->data, but it never checks that those bytes are part of the mgmt command payload. A short command can therefore make add_ext_adv_data() pass an out-of-bounds pointer into tlv_data_is_valid(). If the bytes beyond the command buffer are addressable, they can also be copied into the advertising instance as scan response data, where the caller can read them back via MGMT_OP_GET_ADV_INSTANCE. The trigger requires CAP_NET_ADMIN in the initial user namespace; KASAN reports an 8-byte slab-out-of-bounds read. Reject commands whose length does not match the fixed header plus both advertising data lengths before parsing cp->data.
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: 7.0.11; patch: 6.18.34; patch: 6.12.92; 12410572833a283ce92fcf9679ca8a2f372097ee <0bc1a5a69f541859293d79db72bd7854ac48df51; 12410572833a283ce92fcf9679ca8a2f372097ee <f1febe93ef075314615f970a87681d9ab86691d1; patch: 5.15.210; patch: 0; 12410572833a283ce92fcf9679ca8a2f372097ee <a143ce77a5292f2c9285137433d879ce71d190a7; 12410572833a283ce92fcf9679ca8a2f372097ee <0d5104390b445e7bd664ad583837e4c04d892c9d; 12410572833a283ce92fcf9679ca8a2f372097ee <a6c75a3fad226ccbd8ef9110dee87c92c299f2ab; patch: 6.6.142; 12410572833a283ce92fcf9679ca8a2f372097ee <14b01b9cba04e6ce82825f68fc4c4322fa4ffa43; 5.11; patch: 7.1; patch: 6.1.175; 12410572833a283ce92fcf9679ca8a2f372097ee <d3f7d17960ed50df3a6709c5158caff989c8c905
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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