CVE-2026-93144

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject writes through untrusted BTF pointers check_ptr_to_btf_access() lets program-type btf_struct_access callbacks validate writes before the default BTF access path rejects non-read accesses. That bypasses the read-only policy for untrusted BTF pointers created by helpers such as bpf_rdonly_cast(). Reject non-read accesses through PTR_UNTRUSTED BTF pointers at the common entry point, before the callback branch to handle all cases.

• https://git.kernel.org/stable/c/19d5566b84ca1af0256d0d0003e1a081580c3ba3
• https://git.kernel.org/stable/c/644cf4e77c2770d4246f6d12f99bc80d253b0ec6
• https://git.kernel.org/stable/c/ac65c710cc643cbc52b899627577357867249530