CVE-2026-43419 ceph: fix memory leaks in ceph_mdsc_build_path()

What is CVE-2026-43419?

CVE-2026-43419 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

ceph: fix memory leaks in ceph_mdsc_build_path()

Add __putname() calls to error code paths that did not free the "path" pointer obtained by __getname(). If ownership of this pointer is not passed to the caller via path_info.path, the function must free it before returning.

Weakness: CWE-401

Which versions are affected by CVE-2026-43419?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-43419?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-43419 being exploited?

There is no known exploitation of CVE-2026-43419 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-43419, DEBIAN-CVE-2026-43419, GHSA-vhwj-wg7j-8v79, ROOT-OS-DEBIAN-11-CVE-2026-43419, ROOT-OS-DEBIAN-12-CVE-2026-43419, ROOT-OS-UBUNTU-2204-CVE-2026-43419 and 2 more.