Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-43408

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ceph: add a bunch of missing ceph_path_info initializers ceph_mdsc_build_path() must be called with a zero-initialized ceph_pat…

Published May 8, 2026CWE-476EPSS 0.18%

Overview

CVE-2026-43408 is a high-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ceph: add a bunch of missing ceph_path_info initializers

ceph_mdsc_build_path() must be called with a zero-initialized

ceph_path_info parameter, or else the following

ceph_mdsc_free_path_info() may crash.

Example crash (on Linux 6.18.12):

virt_to_cache: Object is not a Slab page!

WARNING: CPU: 184 PID: 2871736 at mm/slub.c:6732 kmem_cache_free+0x316/0x400

[...]

Call Trace:

[...]

ceph_open+0x13d/0x3e0

do_dentry_open+0x134/0x480

vfs_open+0x2a/0xe0

path_openat+0x9a3/0x1160

[...]

cache_from_obj: Wrong slab cache. names_cache but object is from ceph_inode_info

WARNING: CPU: 184 PID: 2871736 at mm/slub.c:6746 kmem_cache_free+0x2dd/0x400

[...]

kernel BUG at mm/slub.c:634!

Oops: invalid opcode: 0000 [#1] SMP NOPTI

RIP: 0010:__slab_free+0x1a4/0x350

Some of the ceph_mdsc_build_path() callers had initializers, but

others had not, even though they were all added by commit 15f519e9f883

("ce

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/43323a5934b660afae687e8e4e95ac328615a5c4Refgit.kernel.org/stable/c/453df1f4535842bf17ff1885a225e153d7ee3374Refgit.kernel.org/stable/c/644b47f0574fd82aeb9d00317eca8d1f2a525c8cRefgit.kernel.org/stable/c/8be8911f590813e6f90bc6407ced1b23e50bc5da

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43408?

CVE-2026-43408 is a high-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-43408?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43408?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43408?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43408 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999