Bug 2414484 (CVE-2025-40144)

Summary: CVE-2025-40144 kernel: nvdimm: ndtest: Return -ENOMEM if devm_kcalloc() fails in ndtest_probe()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-11-12 11:02:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nvdimm: ndtest: Return -ENOMEM if devm_kcalloc() fails in ndtest_probe()

devm_kcalloc() may fail. ndtest_probe() allocates three DMA address
arrays (dcr_dma, label_dma, dimm_dma) and later unconditionally uses
them in ndtest_nvdimm_init(), which can lead to a NULL pointer
dereference under low-memory conditions.

Check all three allocations and return -ENOMEM if any allocation fails,
jumping to the common error path. Do not emit an extra error message
since the allocator already warns on allocation failure.
Comment 1 Alexander B 2025-11-13 15:39:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111256-CVE-2025-40144-f4bd@gregkh/T