CVE-2025-22068: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: make sure ubq->canceling is set when queue is frozen Now ublk driver depends on `ubq->canceling` for deciding if the request can be dispatched via uring_cmd & io_uring_cmd_complete_in_task(). Once ubq->canceling is set, the uring_cmd can be done via ublk_cancel_cmd() and io_uring_cmd_done(). So set ubq->canceling when queue is frozen, this way makes sure that the flag can be observed from ublk_queue_rq() reliably, and avoids use-after-free on uring_cmd.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.7 — 6.12.23
linux	linux_kernel	6.13 — 6.13.11
linux	linux_kernel	6.14 — 6.14.2

References

Advisories & Patches

https://git.kernel.org/stable/c/5491400589e7572c2d2627ed6384302f7672aa1d https://git.kernel.org/stable/c/7e3497d7dacb5aee69dd9be842b778083cae0e75 https://git.kernel.org/stable/c/8741d0737921ec1c03cf59aebf4d01400c2b461a https://git.kernel.org/stable/c/9158359015f0eda00e521e35b7bc7ebce176aebf

Frequently Asked Questions

What is CVE-2025-22068? +

In the Linux kernel, the following vulnerability has been resolved: ublk: make sure ubq->canceling is set when queue is frozen Now ublk driver depends on `ubq->canceling` for deciding if the request can be dispatched via uring_cmd & io_uring_cmd_complete_in_task(). Once ubq->canceling is set, the uring_cmd can be done via ublk_cancel_cmd() and io_uring_cmd_done(). So set ubq->canceling when queue is frozen, this way makes sure that the flag can be observed from ublk_queue_rq() reliably, and avoids use-after-free on uring_cmd. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-22068? +

CVE-2025-22068 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-22068? +

CVE-2025-22068 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-22068? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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