Bug 2481958 (CVE-2026-45962) - CVE-2026-45962 kernel: ublk: Validate SQE128 flag before accessing the cmd
Summary: CVE-2026-45962 kernel: ublk: Validate SQE128 flag before accessing the cmd
Keywords:
Status: NEW
Alias: CVE-2026-45962
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-27 15:04 UTC by OSIDB Bzimport
Modified: 2026-05-27 23:14 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-05-27 15:04:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ublk: Validate SQE128 flag before accessing the cmd

ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before
IO_URING_F_SQE128 flag check. This could cause out of boundary memory
access.

Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return
-EINVAL immediately if the flag is not set.
Comment 1 Keith Grant 2026-05-27 23:11:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052734-CVE-2026-45962-cd10@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.