Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-43493
Published: May 20, 2026
Vulnerability identifier: #VU131905
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-2026-43493
CWE-ID: CWE-703
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 handling of error conditions in the pcrypt crypto subsystem when processing MAY_BACKLOG requests. A local user can trigger requests that return EBUSY to cause a denial of service.
How to mitigate CVE-2026-43493
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a
- https://git.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67
- https://git.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110
- https://git.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2
- https://git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276