Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-43470

Vulnerability identifier: #VU130706

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2026-43470

CWE-ID: CWE-703

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
openEuler
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
python3-perf-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
python3-perf - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
perf-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
perf - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-tools-devel - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-tools-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-tools - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-source - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-headers - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-devel - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-debugsource - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
bpftool-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
bpftool - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150

• https://git.kernel.org/stable/c/203c792cb4315360d49973ae2e57feeb6d3dcf7e
• https://git.kernel.org/stable/c/410666a298c34ebd57256fde6b24c96bd23059a2
• https://git.kernel.org/stable/c/7e2963773760a664684435201960dd2fb712f1b5
• https://git.kernel.org/stable/c/9ee1770fcb2f1b48354622b926e7dc10222805f5

• Improper Check or Handling of Exceptional Conditions in Linux kernel nfs
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 24.03 LTS update for kernel