SB2026061038 - Improper locking in Linux kernel nvme target driver
Published: June 10, 2026
Security Bulletin ID
SB2026061038
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2026-46304)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization in nvmet_ctrl_free when freeing a controller while processing nvmet-wq work items. A local user can trigger controller teardown to cause a denial of service.
The issue can lead to a possible recursive locking condition on the nvmet-wq workqueue during NVMe target controller teardown.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/551f445a56a11a6457550cddcf39c9ebb8bcacc6
- https://git.kernel.org/stable/c/781f47d641432c26c19625b2cdd7f40825097592
- https://git.kernel.org/stable/c/8d66ba89480ff098a58d79003a505f383aa4e920
- https://git.kernel.org/stable/c/9a4d7222c0955b221e38bb66d10e6bccb672c8a1
- https://git.kernel.org/stable/c/a696fbbd5240b4ac9b166f7bd4c550882ff543f1
- https://git.kernel.org/stable/c/aade8abd8b868b6ffa9697aadaea28ec7f65bee6
- https://git.kernel.org/stable/c/ae5b0cad163833e10b271e9becc05d81dae56e5f
- https://git.kernel.org/stable/c/ee6e20c4bc9eae542a0954a368449532383169d4