Bug 2536365 (CVE-2026-92496)

Summary:	CVE-2026-92496 kernel: wifi: ath11k: Avoid buffer overread in ath11k_wmi_tlv_op_rx()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the ath11k Wi-Fi driver in the Linux kernel. This vulnerability allows a buffer overread to occur in the ath11k_wmi_tlv_op_rx() function. The driver reads the firmware buffer without adequately verifying its size, which could lead to reading data beyond the allocated memory. This issue may result in information disclosure or a denial of service (DoS) due to system instability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-17 17:34:07 UTC

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

wifi: ath11k: Avoid buffer overread in ath11k_wmi_tlv_op_rx()

Currently, in ath11k_wmi_tlv_op_rx(), the firmware buffer is read
without first verifying that the buffer has enough data to hold a
header. This could result in a buffer overread.

Add an upfront length check before dereferencing skb->data as a
wmi_cmd_hdr. The check is placed before the trace_ath11k_wmi_event()
call to preserve the existing trace semantics (tracing the full raw
WMI event including the header), unlike the analogous ath12k fix which
could use skb_pull_data() directly.

Compile tested only.

Comment 1 gkamathe 2026-09-20 18:34:07 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92496.mbox