Bug 2540474 (CVE-2026-93807) - CVE-2026-93807 kernel: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers
Summary: CVE-2026-93807 kernel: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ci...
Keywords:
Status: NEW
Alias: CVE-2026-93807
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-24 16:58 UTC by OSIDB Bzimport
Modified: 2026-09-28 12:55 UTC (History)
17 users (show)

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


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Description OSIDB Bzimport 2026-09-24 16:58:09 UTC
In the Linux kernel, the following vulnerability has been resolved:

wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers

rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and
data[24] whenever key data is present. Those offsets are only part of
the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as
CCMP, do not provide those bytes, so the unconditional copies can read
past the supplied key buffer.

Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are
shorter than the expected 32-byte layout.

[drop useless length check]


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