CVE-2024-35987
In the Linux kernel, the following vulnerability has been resolved: riscv: Fix loading 64-bit NOMMU kernels past the start of RAM commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping") added logic to allow using RAM below the kernel…
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: riscv: Fix loading 64-bit NOMMU kernels past the start of RAM commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping") added logic to allow using RAM below the kernel load address. However, this does not work for NOMMU, where PAGE_OFFSET is fixed to the kernel load address. Since that range of memory corresponds to PFNs below ARCH_PFN_OFFSET, mm initialization runs off the beginning of mem_map and corrupts adjacent kernel memory. Fix this by restoring the previous behavior for NOMMU kernels.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/aea702dde7e9876fb00571a2602f25130847bf0fPatch
- https://git.kernel.org/stable/c/b008e327fa570aca210f98c817757649bae56694Patch
- https://git.kernel.org/stable/c/ea6628e4e2353978af7e3b4ad4fdaab6149acf3dPatch
- https://git.kernel.org/stable/c/aea702dde7e9876fb00571a2602f25130847bf0fPatch
- https://git.kernel.org/stable/c/b008e327fa570aca210f98c817757649bae56694Patch
- https://git.kernel.org/stable/c/ea6628e4e2353978af7e3b4ad4fdaab6149acf3dPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.