Bug 2298207 (CVE-2022-48863)

Summary: CVE-2022-48863 kernel: mISDN: Fix memory leak in dsp_pipeline_build()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 5.10.106, kernel 5.15.29, kernel 5.16.15, kernel 5.17 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the dsp_pipeline_build function in the Linux kernel's mISDN driver, which can cause a memory leak when the function allocates memory with kstrdup and subsequently modifies the pointer with strsep, leading to a scenario where kfree is called on a NULL pointer.
 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 2024-07-16 13:34:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mISDN: Fix memory leak in dsp_pipeline_build()

dsp_pipeline_build() allocates dup pointer by kstrdup(cfg),
but then it updates dup variable by strsep(&dup, "|").
As a result when it calls kfree(dup), the dup variable contains NULL.

Found by Linux Driver Verification project (linuxtesting.org) with SVACE.