Resource Injection Affecting kernel-debuginfo-common-x86_64 package, versions <0:4.14.343-259.562.amzn2

Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo-common-x86_64 package and not the kernel-debuginfo-common-x86_64 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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

pstore/ram: Fix crash when setting number of cpus to an odd number

When the number of cpu cores is adjusted to 7 or other odd numbers, the zone size will become an odd number. The address of the zone will become: addr of zone0 = BASE addr of zone1 = BASE + zone_size addr of zone2 = BASE + zone_size*2 ... The address of zone1/3/5/7 will be mapped to non-alignment va. Eventually crashes will occur when accessing these va.

So, use ALIGN_DOWN() to make sure the zone size is even to avoid this bug.

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52619
• https://git.kernel.org/stable/c/0593cfd321df9001142a9d2c58d4144917dff7ee
• https://git.kernel.org/stable/c/2a37905d47bffec61e95d99f0c1cc5dc6377956c
• https://git.kernel.org/stable/c/75b0f71b26b3ad833c5c0670109c0af6e021e86a
• https://git.kernel.org/stable/c/8b69c30f4e8b69131d92096cb296dc1f217101e4
• https://git.kernel.org/stable/c/a63e48cd835c34c38ef671d344cc029b1ea5bf10
• https://git.kernel.org/stable/c/cd40e43f870cf21726b22487a95ed223790b3542
• https://git.kernel.org/stable/c/d49270a04623ce3c0afddbf3e984cb245aa48e9c
• https://git.kernel.org/stable/c/e9f6ac50890104fdf8194f2865680689239d30fb
• https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
• https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html