CVE-2024-38543

Summary

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

lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure

The kcalloc() in dmirror_device_evict_chunk() will return null if the physical memory has run out. As a result, if src_pfns or dst_pfns is dereferenced, the null pointer dereference bug will happen.

Moreover, the device is going away. If the kcalloc() fails, the pages mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in kcalloc().

Finally, as there is no need to have physically contiguous memory, Switch kcalloc() to kvcalloc() in order to avoid failing allocations.

Affected Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

• https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64
• https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33
• https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7
• https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc
• https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64
• https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33
• https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7
• https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc
• https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3

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