CVE-2026-53099 bpf: Switch CONFIG_CFI_CLANG to CONFIG_CFI

What is CVE-2026-53099?

CVE-2026-53099 is a medium-severity vulnerability in Linux kernel, published on 24 Jun 2026. 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:

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.

Which versions are affected by CVE-2026-53099?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-53099?

Apply the vendor's patch.

Is CVE-2026-53099 being exploited?

There is no known exploitation of CVE-2026-53099 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 DEBIAN-CVE-2026-53099, GHSA-x2xc-9pfh-8g6q, UBUNTU-CVE-2026-53099.