CVE-2024-35987 (GCVE-0-2024-35987)

Vulnerability from cvelistv5 – Published: 2024-05-20 09:47 – Updated: 2025-05-04 09:09
VLAI?
Title
riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3335068f87217ea59d08f462187dc856652eea15 , < b008e327fa570aca210f98c817757649bae56694 (git)
Affected: 3335068f87217ea59d08f462187dc856652eea15 , < ea6628e4e2353978af7e3b4ad4fdaab6149acf3d (git)
Affected: 3335068f87217ea59d08f462187dc856652eea15 , < aea702dde7e9876fb00571a2602f25130847bf0f (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.30 , ≤ 6.6.* (semver)
Unaffected: 6.8.9 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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