CVE-2026-68151
Received Received - Intake

Memory Corruption in Linux Kernel binfmt_elf_fdpic

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

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").

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68151
EUVD
EUVD-2026-55537

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 2.6.11 (inc)

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a flaw in the binfmt_elf_fdpic module where multiple PT_INTERP program headers in a binary cause memory leaks and file permission issues. The program header scan incorrectly handles PT_INTERP, leading to overwriting of interpreter references and denial of file access for the interpreter, which persists until system reboot.

Impact Analysis

An unprivileged attacker could exploit this by crafting a binary with multiple PT_INTERP headers, causing system resources to leak and preventing file access for critical interpreter files. This could lead to denial of service or instability on affected systems.

Mitigation Strategies

Update the Linux kernel to the latest stable version that includes the fix for this vulnerability. Monitor vendor advisories for kernel updates and apply patches promptly.

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