Bug 2536367 (CVE-2026-93062)

Summary:	CVE-2026-93062 kernel: wifi: iwlwifi: guard against division by zero in iwl_dbg_tlv_alloc_fragments
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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:
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Doc Text:	A flaw was found in the Linux kernel's iwlwifi driver. This vulnerability is caused by a division-by-zero error within the `iwl_dbg_tlv_alloc_fragments` function when the number of fragments is zero. This could lead to a system crash, resulting in a Denial of Service (DoS).	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 17:34:10 UTC

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

wifi: iwlwifi: guard against division by zero in iwl_dbg_tlv_alloc_fragments

Make sure we don't end-up with a num_frags = 0 situation.
For that, check that the required size is not 0 and put a checker on
num_frags as well.

Comment 1 gkamathe 2026-09-19 21:27:29 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93062.mbox