# CVE-2024-35987: linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: Fix loading 64-bit NOMMU kernels past the...

CVE-2024-35987 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-35987, released May 20, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-35987
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 20, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.8.9-1 | [DEBIAN-CVE-2024-35987](https://patchblox.com/security/data/fix/linux/debian-cve-2024-35987.md) | May 20, 2024 |
| Linux | linux Debian 14 | 6.8.9-1 | [DEBIAN-CVE-2024-35987](https://patchblox.com/security/data/fix/linux/debian-cve-2024-35987.md) | May 20, 2024 |

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