CVE-2026-53099: bpf: Switch CONFIG_CFI_CLANG to CONFIG_CFI

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-24 · updated 2026-07-21

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Switch CONFIG_CFI_CLANG to CONFIG_CFI This was renamed in commit 23ef9d439769 ("kcfi: Rename CONFIG_CFI_CLANG to CONFIG_CFI") as it is now a compiler-agnostic option. Using the wrong name results in the code getting compiled out. Meaning the CFI failures for btf_dtor_kfunc_t would still trigger.

Affected products

Linux kernel: from 7.0 before 7.0.10 — fixed in 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 7.0.10. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/9b0cf064ea0a6bac5e1a5fb43b004fd52fbe2b3b
https://git.kernel.org/stable/c/f74fce43dbc059e059b5346a670f697c0e97b1d0

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