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Alpine Linux: CVE-2023-46837: Improper Restriction of Operations within the Bounds of a Memory Buffer

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Alpine Linux: CVE-2023-46837: Improper Restriction of Operations within the Bounds of a Memory Buffer

Severity
2
CVSS
(AV:L/AC:L/Au:S/C:P/I:N/A:N)
Published
01/05/2024
Created
08/23/2024
Added
08/22/2024
Modified
10/02/2024

Description

Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory. This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.

Solution(s)

  • alpine-linux-upgrade-xen

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