CVE-2026-45962 Details
Description
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.
A vulnerability exists in the Linux kernel's userspace block driver (ublk) related to the validation of the SQE128 flag in the io_uring command processing. The issue arises because the command dump function accesses the command header before checking if the SQE128 flag is set. This oversight can lead to out-of-bounds memory access. The vulnerability affects the Linux kernel stable tree.
Users can update to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched version are available on the Linux kernel official website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684 | kernel.org | Patch |
| https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a | kernel.org | Patch |
| https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67 | kernel.org | Patch |
| https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb | kernel.org | Patch |
| https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.0, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| May 27, 2026 | New CVE Received | kernel.org |