What’s Vulnerable › Vulnerabilities

CVE-2024-53099: bpf: Check validity of link->type in bpf_link_show_fdinfo()

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-25 · updated 2026-08-04
• Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Check validity of link->type in bpf_link_show_fdinfo() If a newly-added link type doesn't invoke BPF_LINK_TYPE(), accessing bpf_link_type_strs[link->type] may result in an out-of-bounds access. To spot such missed invocations early in the future, checking the validity of link->type in bpf_link_show_fdinfo() and emitting a warning when such invocations are missed.

Affected products

• Linux kernel: before 6.6.62; from 6.7 before 6.11.9; 6.12-rc1, 6.12-rc2, 6.12-rc3, 6.12-rc4 — fixed in 6.11.9, 6.6.62

How to fix

Upgrade to a fixed version: Linux kernel 6.11.9, 6.6.62. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/24fec234d2ba9ca3c14e545ebe3fd6dcb47f074d
• https://git.kernel.org/stable/c/4e8074bb33d18f56af30a0252cb3606d27eb1c13
• https://git.kernel.org/stable/c/79f87a6ec39fb5968049a6775a528bf58b25c20a
• https://git.kernel.org/stable/c/8421d4c8762bd022cb491f2f0f7019ef51b4f0a7
• https://git.kernel.org/stable/c/b3eb1b6a9f745d6941b345f0fae014dc8bb06d36
• https://git.kernel.org/stable/c/d5092b0a1aaf35d77ebd8d33384d7930bec5cb5d
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

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