CVE-2024-53187: io_uring: check for overflows in io_pin_pages

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-27 · updated 2026-10-30
Weakness: CWE-190

Description

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.

Affected products

Linux kernel: before 6.11.11; from 6.12 before 6.12.2 — fixed in 6.11.11, 6.12.2
Linux: 5.1 — fixed in 6.13

How to fix

Upgrade to a fixed version: Linux kernel 6.11.11, 6.12.2; Linux 6.13. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-53187 or the next vulnerability affects your stack