io_uring: check for overflows in io_pin_pages

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring: check for overflows in io_pin_pages WARNING: CPU: 0 PID: 5834 at io_uring/memmap.c:144 io_pin_pages+0x149/0x180 io_uring/memmap.c:144 CPU: 0 UID: 0 PID: 5834 Comm: syz-executor825 Not tainted 6.12.0-next-20241118-syzkaller #0 Call Trace: <TASK> __io_uaddr_map+0xfb/0x2d0 io_uring/memmap.c:183 io_rings_map io_uring/io_uring.c:2611 [inline] io_allocate_scq_urings+0x1c0/0x650 io_uring/io_uring.c:3470 io_uring_create+0x5b5/0xc00 io_uring/io_uring.c:3692 io_uring_setup io_uring/io_uring.c:3781 [inline] ... </TASK> io_pin_pages()'s uaddr parameter came directly from the user and can be garbage. Don't just add size to it as it can overflow.

Timeline

1. Dec 27, 2024, 1:49 PM UTCCVE published
2. Oct 1, 2025, 8:04 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 21, 2026, 12:35 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 2b188cc1bb857a9d4701ae59aa7768b5124e262e · fixed in 1a0aecabff72a95d240e6d7645949bfe0620dcd7; From 2b188cc1bb857a9d4701ae59aa7768b5124e262e · fixed in 29eac3eca72d4c2a71122050c37cd7d8f73ac4f3; From 2b188cc1bb857a9d4701ae59aa7768b5124e262e · fixed in aaa90844afd499c9142d0199dfda74439314c013; From 2b188cc1bb857a9d4701ae59aa7768b5124e262e · fixed in 0c0a4eae26ac78379d0c1db053de168a8febc6c9

• Linux Linux

  5.1

• KernelLinux

  From 5.1.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.11.11; From 6.12.0 · fixed in 6.12.2

References 4