Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-64003
Published: July 20, 2026
Vulnerability identifier: #VU138655
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-64003
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state handling in scsi_run_host_queues() when processing requeued commands during SCSI host recovery and device removal. A local user can trigger SCSI error recovery and device removal conditions to cause a denial of service.
The issue can leave requeued requests stuck and cause the affected device removal process to hang.
How to mitigate CVE-2026-64003
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/15fb19af49f2073ed77fad16aaabc648b0ca6800
- https://git.kernel.org/stable/c/475f2b37a78f4c698967a7f14f325f04e24c9175
- https://git.kernel.org/stable/c/7205b58702273baf21d6ba7992e6ba15852325f7
- https://git.kernel.org/stable/c/c740e13e7fe32d8e4d9a1699f65b8daf6709895a
- https://git.kernel.org/stable/c/d4dddfecdbb5467bef158d4e1486459808357fef