PT-2026-39055 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43394

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A credential reference leak exists in the nfsd nl listener set doit() function. The issue occurs because the function utilizes get current cred() without a corresponding put cred() call to release the reference. Since the function operates within the process context and current->cred remains stable during sendmsg(), the additional reference count provided by get current cred() is unnecessary for svc xprt create from sa().

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-43394

Affected Products

Linux Kernel

References · 15

• https://security-tracker.debian.org/tracker/CVE-2026-43394 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43394 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43394 · Security Note
• https://git.kernel.org/stable/c/02e87ec0bc706cb93fa47b43d18c4d10102c7d54 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43394 · Vendor Advisory
• https://git.kernel.org/stable/c/019debe5851d7355bea9ff0248cc317878924d8f · Patch
• https://git.kernel.org/stable/c/92978c83bb4eef55d02a6c990c01c423131eefa7 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43394 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43394 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43394 · Security Note
• https://git.kernel.org/stable/c/cba413765376bb466035c9160fa3130402971e2c · Patch
• https://twitter.com/CVEnew/status/2052767688536326648 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-43394 · Note
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://git.kernel.org/linus/92978c83bb4eef55d02a6c990c01c423131eefa7 · Note