CVE-2026-90804
Received Received - Intake

Buffer Overflow in GNU Binutils Eh Frame Section Handler

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulDB

Description
A vulnerability was detected in GNU Binutils 2.47. Affected by this issue is the function _bfd_elf_write_section_eh_frame of the file bfd/elf-eh-frame.c of the component Eh Frame Section Handler. Performing a manipulation of the argument cie_length/fde_length/augmentation_data_size/write_offset results in buffer overflow. Attacking locally is a requirement. The exploit is now public and may be used. The project was informed of the problem early through a bug report but has not responded yet.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-14
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-90804
EUVD
EUVD-2026-77642

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gnu binutils 2.47

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

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Executive Summary

CVE-2026-90804 is a buffer overflow vulnerability in GNU Binutils 2.47 affecting the _bfd_elf_write_section_eh_frame function in bfd/elf-eh-frame.c. It occurs when manipulating arguments like cie_length, fde_length, or augmentation_data_size, leading to heap overflows during the linking stage. The exploit requires local access and is now public.

Detection Guidance

Detecting this vulnerability requires checking for crashes in the GNU linker (ld) during the final linking stage, particularly when processing malformed .eh_frame sections. Monitor for segmentation faults, heap corruption errors, or negative-size memmove operations in linker logs. Use tools like gdb to trace crashes in _bfd_elf_write_section_eh_frame.

Impact Analysis

This vulnerability could allow attackers to execute arbitrary code, leak sensitive information, or cause denial of service by crashing the linker. It affects systems using GNU Binutils 2.47, particularly in build environments processing untrusted object files. Exploitation may lead to system compromise if malicious files are linked.

Compliance Impact

This vulnerability primarily causes buffer overflows and heap corruption in GNU Binutils during linking, leading to crashes or potential code execution. It does not directly impact compliance with GDPR or HIPAA, as those standards focus on data protection, privacy, and security controls rather than linker functionality.

Mitigation Strategies

Avoid using specific linker flags on untrusted files: --shared -z relro, --version-exports-section, --gc-sections -w. Update GNU Binutils to a patched version once available. Restrict access to linker tools in build environments to trusted users only.

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