CVE-2026-45962
ublk: Validate SQE128 flag before accessing the cmd
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.
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
June 17, 2026, 10:52 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Ensure flag check precedes memory access.
- Return -EINVAL if flag is not set.
- Update the Linux kernel to the resolved version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45962.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45962 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45962
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45962 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45962 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '71f28f3136aff5890cd56de78abc673f8393cad9', 'lessThan': '4b4dff498f46e9802f71bc84258bf73065f51c6a', 'versionType': 'git'}, {'status': 'affected', 'version': '71f28f3136aff5890cd56de78abc673f8393cad9', 'lessThan': '31cac6acf77ece488f29fb8f79589d9298e969c8', 'versionType': 'git'}, {'status': 'affected', 'version': '71f28f3136aff5890cd56de78abc673f8393cad9', 'lessThan': 'dbe8e81a2ec608f87f79a34f6444cd62f6a243bb', 'versionType': 'git'}, {'status': 'affected', 'version': '71f28f3136aff5890cd56de78abc673f8393cad9', 'lessThan': 'f75a5555e0049e7857eae25b60aee98b80e287ec', 'versionType': 'git'}, {'status': 'affected', 'version': '71f28f3136aff5890cd56de78abc673f8393cad9', 'lessThan': '17d33ba7291100008360b5a354962db37ad80684', 'versionType': 'git'}, {'status': 'affected', 'version': '71f28f3136aff5890cd56de78abc673f8393cad9', 'lessThan': 'da7e4b75e50c087d2031a92f6646eb90f7045a67', 'versionType': 'git'}], 'programFiles': ['drivers/block/ublk_drv.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.165', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.128', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.75', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.14', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '6.19.4', 'versionType': 'semver', 'lessThanOrEqual': '6.19.*'}, {'status': 'unaffected', 'version': '7.0', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/block/ublk_drv.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Jun. 16, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.128 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.75 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.0 up to (excluding) 6.1.165 Added Reference Type kernel.org: https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684 Added Reference https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8 Added Reference https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a Added Reference https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67 Added Reference https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb Added Reference https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec