Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-43470
Published: May 8, 2026
Vulnerability identifier: #VU130706
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-2026-43470
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 directory aliases in nfs3_proc_create when processing concurrent file creation and removal operations with the same name. A local user can trigger concurrent create and open operations without O_EXCL to cause a denial of service.
The issue can result in a kernel oops when a negative dentry is supplied to do_dentry_open during finish_open.
How to mitigate CVE-2026-43470
Install security update from vendor's repository.