Bug 2507251 (CVE-2026-64499)

Summary:	CVE-2026-64499 kernel: iio: adc: ti-ads1119: fix PM reference leak in buffer preenable
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	rhel-process-autobot, 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 `ti-ads1119` Analog-to-Digital Converter (ADC) driver. This vulnerability occurs during the buffer pre-enable process, where a Power Management (PM) reference is not properly released if an I2C communication error occurs. This oversight can lead to a resource leak, potentially causing the affected device to remain active indefinitely and consume system resources, which could result in 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 2026-07-25 10:12:53 UTC

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

iio: adc: ti-ads1119: fix PM reference leak in buffer preenable

ads1119_triggered_buffer_preenable() resumes the device with
pm_runtime_resume_and_get() before starting a conversion.

If i2c_smbus_write_byte() fails, the function returns the error directly
and leaves the runtime PM usage counter elevated. The matching
postdisable callback is not called when preenable fails, so the reference
is leaked and the device may remain runtime-active indefinitely.

Store the I2C transfer result in ret and drop the runtime PM reference on
failure before returning the error.

Comment 1 TEJ RATHI 2026-07-29 07:06:52 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072552-CVE-2026-64499-a81c@gregkh/T