PT-2026-39052 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-08 · CVE-2026-43391

Positive Technologies (AI Summary)

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

Description An issue exists in the nsfs component where permission checks for handle opening are insufficiently restrictive. This allows privileged services to potentially see namespaces of other privileged services, which could lead to information leakage. The resolution involves implementing the may see all namespaces() helper function to centralize the policy governing namespace visibility.

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

Related Identifiers

CVE-2026-43391

Affected Products

Linux Kernel

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-43391 · Security Note
• https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5e · Note
• https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdf · Note
• https://twitter.com/CVEnew/status/2052767692386640311 · Twitter Post
• https://twitter.com/infoflowcloud/status/2052769630725275873 · Twitter Post