CVE-2024-36947 qibfs: fix dentry leak

What is CVE-2024-36947?

CVE-2024-36947 is a medium-severity denial of service vulnerability in Linux kernel, published on 30 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

qibfs: fix dentry leak

simple_recursive_removal() drops the pinning references to all positives in subtree. For the cases when its argument has been kept alive by the pinning alone that's exactly the right thing to do, but here the argument comes from dcache lookup, that needs to be balanced by explicit dput().

Fucked-up-by: Al Viro <[email protected]>

Weakness: CWE-401

Which versions are affected by CVE-2024-36947?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-36947?

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-2024-36947 being exploited?

There is no known exploitation of CVE-2024-36947 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
• How this page is made

Also known as BELL-CVE-2024-36947, DEBIAN-CVE-2024-36947, UBUNTU-CVE-2024-36947.