CVE-2026-93144

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux282de143ead96a5d53331e946f31c977b4610a74 < 19d5566b84ca1af0256d0d0003e1a081580c3ba3affected
LinuxLinux282de143ead96a5d53331e946f31c977b4610a74 < ac65c710cc643cbc52b899627577357867249530affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References