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CVE-2024-36019

Disclosure Date: May 30, 2024
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Description

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

regmap: maple: Fix cache corruption in regcache_maple_drop()

When keeping the upper end of a cache block entry, the entry[] array
must be indexed by the offset from the base register of the block,
i.e. max – mas.index.

The code was indexing entry[] by only the register address, leading
to an out-of-bounds access that copied some part of the kernel
memory over the cache contents.

This bug was not detected by the regmap KUnit test because it only
tests with a block of registers starting at 0, so mas.index == 0.

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General Information

Vendors

  • Linux

Products

  • Linux

Additional Info

Technical Analysis