CVE-2021-47432 lib/generic-radix-tree.c: Don't overflow in peek()

What is CVE-2021-47432?

CVE-2021-47432 is a medium-severity vulnerability in Linux kernel, published on 21 May 2024. 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:

lib/generic-radix-tree.c: Don't overflow in peek()

When we started spreading new inode numbers throughout most of the 64 bit inode space, that triggered some corner case bugs, in particular some integer overflows related to the radix tree code. Oops.

Weakness: CWE-190

Which versions are affected by CVE-2021-47432?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-47432?

Apply the vendor's patch.

Is CVE-2021-47432 being exploited?

There is no known exploitation of CVE-2021-47432 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 AZL-59441, DEBIAN-CVE-2021-47432, GHSA-r92r-c64c-j7jx, ROOT-OS-DEBIAN-11-CVE-2021-47432, ROOT-OS-UBUNTU-2204-CVE-2021-47432, UBUNTU-CVE-2021-47432.