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PatchSiren cyber security CVE debrief

CVE-2026-90804 GNU CVE debrief

A buffer overflow vulnerability was detected in GNU Binutils 2.47, specifically in the _bfd_elf_write_section_eh_frame function of the bfd/elf-eh-frame.c file. This issue is triggered by manipulating the cie_length, fde_length, augmentation_data_size, or write_offset arguments, and requires local access to exploit. The exploit is public, but the project has not yet responded to the bug report.

Vendor
GNU
Product
Binutils
CVSS
LOW 0.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-14
Original CVE updated
2026-09-18
Advisory published
2026-09-14
Advisory updated
2026-09-18

Who should care

Defenders responsible for maintaining GNU Binutils installations should assess exposure and prioritize updates to prevent local exploitation. This includes verifying installation integrity, reviewing official advisories, and monitoring systems for suspicious activity. The vulnerability affects GNU Binutils 2.47, and defenders should ensure that all local systems are updated to the latest version.

Why it matters

This vulnerability allows for a local buffer overflow exploit in GNU Binutils 2.47, requiring defenders to verify installation integrity and update systems.

  • Verify GNU Binutils installation integrity
  • Update local systems to the latest version
  • Monitor local systems for suspicious activity

Technical summary

The _bfd_elf_write_section_eh_frame function in bfd/elf-eh-frame.c is vulnerable to a buffer overflow attack. This occurs when the cie_length, fde_length, augmentation_data_size, or write_offset arguments are manipulated, allowing for a local exploit. Defenders should prioritize verifying the integrity of the GNU Binutils installation and ensuring that all local systems are updated to the latest version. The vulnerability was detected in GNU Binutils 2.47, and the affected function requires local access and manipulation of specific arguments.

Defensive priority

Defenders should prioritize verifying the integrity of the GNU Binutils installation and ensuring that all local systems are updated to the latest version.

Recommended defensive actions

  • Verify the integrity of the GNU Binutils installation
  • Ensure all local systems are updated to the latest version
  • Monitor local systems for suspicious activity
  • Review compensating controls for exposed systems
  • Check relevant monitoring, detection, and logs for exposed assets
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was detected in GNU Binutils 2.47, and the affected function is _bfd_elf_write_section_eh_frame in bfd/elf-eh-frame.c. The exploit requires local access and manipulation of specific arguments. Defenders should verify installation integrity, review official advisories, and monitor systems for suspicious activity. The CVE record and NVD detail page provide additional context.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-90804 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-90804

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-90804 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-90804

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://github.com/r1ck9-2q/cve_summit/blob/main/Heap%20OOB%20write%20%20negative-size%20%60memmove%60%20%20SEGV%20in%20%60_bfd_elf_write_section_eh_frame%60%20(bfdelf-eh-frame.c2064%20%202083%20%202193)%20via%20malformed%20%60.eh_frame%60.md

    [email protected] - Exploit, Mitigation, Third Party Advisory

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/cve/CVE-2026-90804

    [email protected] - Third Party Advisory, VDB Entry

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/submit/920281

    [email protected] - Exploit, Third Party Advisory, VDB Entry

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/403306

    [email protected] - Permissions Required, Third Party Advisory, VDB Entry

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/403306/cti

    [email protected] - Permissions Required, Third Party Advisory, VDB Entry

  • Source reference

    Unverified legacy reference

    URL: https://www.gnu.org/

    [email protected] - Product

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.