Bug 2507269 (CVE-2026-64442) - CVE-2026-64442 kernel: staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()
Summary: CVE-2026-64442 kernel: staging: rtl8723bs: fix OOB reads in IE loops in issue...
Keywords:
Status: NEW
Alias: CVE-2026-64442
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-25 10:13 UTC by OSIDB Bzimport
Modified: 2026-07-27 06:43 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-07-25 10:13:46 UTC
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.


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