CVE-2026-68151

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

binfmt_elf_fdpic: only honour the first PT_INTERP

The program header scan handles PT_INTERP from a switch nested in the

scan loop, so its break leaves the switch and not the loop. A binary

carrying more than one PT_INTERP runs the case again and overwrites both

interpreter_name and interpreter. The previous name allocation leaks and

so does the previous interpreter reference, along with the write denial

open_exec() took on it. The denial is never released, so the file stays

unwritable for as long as the system runs.

An unprivileged caller reaches this with a crafted binary and repeats it

at will. binfmt_elf stops at the first PT_INTERP. Do the same here.

The flaw dates back to the driver's introduction in the pre-git history

tree introduced in v2.6.11 by 91808d6ebe39 ("[PATCH] FRV: Add FDPIC ELF

binary format driver").

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References