Bug 2540400 (CVE-2026-97451)

Summary:	CVE-2026-97451 kernel: ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
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:
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Doc Text:	A flaw was found in the Linux kernel's ACPICA (Advanced Configuration and Power Interface Component Architecture) subsystem. An integer overflow occurs when calculating string or buffer truncation lengths during ACPI operation processing. A local attacker could exploit this vulnerability to trigger an invalid size calculation in memory copy routines, resulting in out-of-bounds memory access, a kernel crash, and a Denial of Service (DoS).	Story Points:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-24 16:41:17 UTC

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

ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)

Add overflow check for Index + Length to prevent integer overflow
when calculating the truncation length. This prevents negative
size parameter being passed to memcpy().

Comment 1 Mauro Matteo Cascella 2026-09-29 16:23:00 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97451.mbox