Bug 2422777 (CVE-2025-68256) - CVE-2025-68256 kernel: staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
Summary: CVE-2025-68256 kernel: staging: rtl8723bs: fix out-of-bounds read in rtw_get_...
Keywords:
Status: NEW
Alias: CVE-2025-68256
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-16 15:04 UTC by OSIDB Bzimport
Modified: 2025-12-16 20:49 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2025-12-16 15:04:09 UTC
In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser

The Information Element (IE) parser rtw_get_ie() trusted the length
byte of each IE without validating that the IE body (len bytes after
the 2-byte header) fits inside the remaining frame buffer. A malformed
frame can advertise an IE length larger than the available data, causing
the parser to increment its pointer beyond the buffer end. This results
in out-of-bounds reads or, depending on the pattern, an infinite loop.

Fix by validating that (offset + 2 + len) does not exceed the limit
before accepting the IE or advancing to the next element.

This prevents OOB reads and ensures the parser terminates safely on
malformed frames.


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