Bug 2466998 (CVE-2026-43113)

Summary:	CVE-2026-43113 kernel: wifi: wl1251: validate packet IDs before indexing tx_frames
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the `wl1251` Wi-Fi driver within the Linux kernel. The `wl1251_tx_packet_cb()` function processes firmware completion IDs without proper validation, allowing an attacker to use a crafted ID to access memory outside of allocated bounds. This out-of-bounds access could lead to memory corruption and potentially a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 10:02:29 UTC

In the Linux kernel, the following vulnerability has been resolved:

wifi: wl1251: validate packet IDs before indexing tx_frames

wl1251_tx_packet_cb() uses the firmware completion ID directly to index
the fixed 16-entry wl->tx_frames[] array. The ID is a raw u8 from the
completion block, and the callback does not currently verify that it
fits the array before dereferencing it.

Reject completion IDs that fall outside wl->tx_frames[] and keep the
existing NULL check in the same guard. This keeps the fix local to the
trust boundary and avoids touching the rest of the completion flow.

Comment 1 Alexander B 2026-05-06 14:34:35 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050625-CVE-2026-43113-cc30@gregkh/T