CVE-2024-35987

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3335068f87217ea59d08f462187dc856652eea15 < b008e327fa570aca210f98c817757649bae56694affected
LinuxLinux3335068f87217ea59d08f462187dc856652eea15 < ea6628e4e2353978af7e3b4ad4fdaab6149acf3daffected
LinuxLinux3335068f87217ea59d08f462187dc856652eea15 < aea702dde7e9876fb00571a2602f25130847bf0faffected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.30 <= 6.6.*unaffected
LinuxLinux6.8.9 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References