CVE-2026-90383

Summary

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

misc: sgi-gru: remove interrupt-context page-table walks

The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user page tables and supports only PMD-level large mappings on x86-64.

Remove the direct walker. Send interrupt faults directly to user polling mode so the existing call-OS fallback retries them in process context.

Remove the mmap-lock failure statistic that can no longer be incremented.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux142586409c8be7dc071bb94d7cd2d69ccfd99b6b < 877423f595b60f8fe7c18b64a5d283d9e1732a13affected
LinuxLinux142586409c8be7dc071bb94d7cd2d69ccfd99b6b < 6248eb1833ff0adfdbbadd5f846c2f22e02a01b0affected
LinuxLinux142586409c8be7dc071bb94d7cd2d69ccfd99b6b < ef81e4a1628ecfb9cfc442de10883f383faf17a1affected
LinuxLinux142586409c8be7dc071bb94d7cd2d69ccfd99b6b < 928a8e9f523df845fc496bcb9811013b67aabec5affected
LinuxLinux2.6.27affected
LinuxLinux0 < 2.6.27unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References