Bug 2562569 (CVE-2026-99100)

Summary:	CVE-2026-99100 kernel: wifi: p54: validate firmware record lengths
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 Linux kernel's p54 wireless driver. This vulnerability can lead to a denial of service (DoS) or kernel information disclosure. The issue occurs because the firmware parser does not properly validate record lengths before reading component data. A local user capable of loading a crafted firmware file could trigger an out-of-bounds read, causing a system crash or leaking kernel memory.	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 2026-10-28 04:01:38 UTC

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

wifi: p54: validate firmware record lengths

The p54 firmware parser accesses component ID and component version
records without checking that their lengths cover the fields being read.
A malformed record can therefore make the parser read past the record.

Validate the component ID and component version record lengths before
accessing their data. The descriptor record is also checked against the
shortest descriptor length found in the supported firmware images.

Reject descriptor values that underflow the RX offset or produce an empty
RX range before updating the driver state.

Comment 1 gkamathe 2026-10-28 10:49:48 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99100.mbox