CVE-2024-46774

Summary

In the Linux kernel, the following vulnerability has been resolved:

powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()

Smatch warns:

arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential spectre issue 'args.args' [r] (local cap)

The 'nargs' and 'nret' locals come directly from a user-supplied buffer and are used as indexes into a small stack-based array and as inputs to copy_to_user() after they are subject to bounds checks.

Use array_index_nospec() after the bounds checks to clamp these values for speculative execution.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d2834ff1d9641a8695a09ea79cd901c7b6d4d05faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a262c2dc833f2fe1bd5c53a4d899e7077d3b1da9affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b137af795399d8b657bad1646c18561530f35ed1affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1f1feff02e9da0dd0cdb195c428c42b5f9b6c771affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 68d8156480940b79227d58865ec5d2947b9384a8affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0974d03eb479384466d828d65637814bee6b26d7affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.237 <= 5.10.*unaffected
LinuxLinux5.15.181 <= 5.15.*unaffected
LinuxLinux6.1.135 <= 6.1.*unaffected
LinuxLinux6.6.88 <= 6.6.*unaffected
LinuxLinux6.10.10 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References