What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-21 · updated 2026-06-17
• Weakness: CWE-190

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.

Affected products

• Linux kernel: before 6.1.64; from 6.2 before 6.5.13; from 6.6 before 6.6.3 — fixed in 6.1.64, 6.5.13, 6.6.3

How to fix

Upgrade to a fixed version: Linux kernel 6.1.64, 6.5.13, 6.6.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/784d01f9bbc282abb0c5ade5beb98a87f50343ac
• https://git.kernel.org/stable/c/9492261ff2460252cf2d8de89cdf854c7e2b28a0
• https://git.kernel.org/stable/c/aa7f1827953100cdde0795289a80c6c077bfe437
• https://git.kernel.org/stable/c/ec298b958cb0c40d70c68079da933c8f31c5134c
• https://git.kernel.org/stable/c/784d01f9bbc282abb0c5ade5beb98a87f50343ac
• https://git.kernel.org/stable/c/9492261ff2460252cf2d8de89cdf854c7e2b28a0
• https://git.kernel.org/stable/c/aa7f1827953100cdde0795289a80c6c077bfe437
• https://git.kernel.org/stable/c/ec298b958cb0c40d70c68079da933c8f31c5134c

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