Red Hat: CVE-2024-36019: kernel: regmap: maple: Fix cache corruption in regcache_maple_drop() (Multiple Advisories)

Red Hat: CVE-2024-36019: kernel: regmap: maple: Fix cache corruption in regcache_maple_drop() (Multiple Advisories)

Severity

5

CVSS

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

Published

05/30/2024

Created

12/06/2024

Added

12/05/2024

Modified

12/05/2024

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.

Solution(s)

• redhat-upgrade-kernel
• redhat-upgrade-kernel-rt

References

• CVE-2024-36019
• RHSA-2024:6567