Bug 2426215 (CVE-2022-50888)

Summary: CVE-2022-50888 kernel: remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A NULL pointer dereference flaw was found in the Qualcomm Q6v5 WCSS remoteproc driver. The q6v5_wcss_init_mmio() function does not check the return value of platform_get_resource_byname() before using it, which can lead to a NULL pointer dereference if the resource lookup fails.
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Description OSIDB Bzimport 2025-12-30 13:16:59 UTC 
In the Linux kernel, the following vulnerability has been resolved:

remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio()

q6v5_wcss_init_mmio() will call platform_get_resource_byname() that may
fail and return NULL. devm_ioremap() will use res->start as input, which
may causes null-ptr-deref. Check the ret value of
platform_get_resource_byname() to avoid the null-ptr-deref.
Comment 1 Alexander B 2025-12-31 00:49:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123015-CVE-2022-50888-5614@gregkh/T