CVE-2022-48732

Summary

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

drm/nouveau: fix off by one in BIOS boundary checking

Bounds checking when parsing init scripts embedded in the BIOS reject access to the last byte. This causes driver initialization to fail on Apple eMac's with GeForce 2 MX GPUs, leaving the system with no working console.

This is probably only seen on OpenFirmware machines like PowerPC Macs because the BIOS image provided by OF is only the used parts of the ROM, not a power-of-two blocks read from PCI directly so PCs always have empty bytes at the end that are never accessed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < d4b746e60fd8eaa8016e144223abe91158edcdadaffected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < 909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2affected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < b2a21669ee98aafc41c6d42ef15af4dab9e6e882affected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < acc887ba88333f5fec49631f12d8cc7ebd95781caffected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < f071d9fa857582d7bd77f4906691f73d3edeab73affected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < d877e814a62b7de9069aeff8bc1d979dfc996e06affected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < e7c36fa8a1e63b08312162179c78a0c7795ea369affected
LinuxLinux4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 < 1b777d4d9e383d2744fc9b3a09af6ec1893c8b1aaffected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux4.9.300 <= 4.9.*unaffected
LinuxLinux4.14.265 <= 4.14.*unaffected
LinuxLinux4.19.228 <= 4.19.*unaffected
LinuxLinux5.4.178 <= 5.4.*unaffected
LinuxLinux5.10.99 <= 5.10.*unaffected
LinuxLinux5.15.22 <= 5.15.*unaffected
LinuxLinux5.16.8 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References