Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3335068f87217ea59d08f462187dc856652eea15 before b008e327fa570aca210f98c817757649bae56694; affected 3335068f87217ea59d08f462187dc856652eea15 before ea6628e4e2353978af7e3b4ad4fdaab6149acf3d; affected 3335068f87217ea59d08f462187dc856652eea15 before aea702dde7e9876fb00571a2602f25130847bf0f |
| Linux / Linux | affected 6.4; unaffected 0 before 6.4; unaffected 6.6.30 through 6.6.*; unaffected 6.8.9 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b008e327fa570aca210f98c817757649bae56694
- https://git.kernel.org/stable/c/ea6628e4e2353978af7e3b4ad4fdaab6149acf3d
- https://git.kernel.org/stable/c/aea702dde7e9876fb00571a2602f25130847bf0f
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.