PT-2026-39069 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43408

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A flaw exists in the Ceph component of the Linux kernel where the ceph mdsc build path() function is called without a zero-initialized ceph path info parameter. Because ceph mdsc build path() only initializes the structure upon success and not on error, subsequent calls to ceph mdsc free path info() can lead to random system crashes or potential privilege escalation.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-43408

Affected Products

Linux Kernel

References · 15

• https://git.kernel.org/stable/c/453df1f4535842bf17ff1885a225e153d7ee3374 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43408 · Vendor Advisory
• https://git.kernel.org/stable/c/644b47f0574fd82aeb9d00317eca8d1f2a525c8c · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43408 · Vendor Advisory
• https://git.kernel.org/stable/c/8be8911f590813e6f90bc6407ced1b23e50bc5da · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43408 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43408 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43408 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43408 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43408 · Security Note
• https://git.kernel.org/stable/c/43323a5934b660afae687e8e4e95ac328615a5c4 · Patch
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://git.kernel.org/linus/43323a5934b660afae687e8e4e95ac328615a5c4 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-43408 · Note
• https://twitter.com/CVEnew/status/2052767670798537023 · Twitter Post