Debian: CVE-2024-38543: linux -- security update

Debian: CVE-2024-38543: linux -- security update

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

06/19/2024

Created

07/31/2024

Added

07/30/2024

Modified

01/28/2025

Description

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.

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2024-38543
• CVE - 2024-38543