# CVE-2026-90830 — GNU Binutils

> As of 2026-09-14, CVE-2026-90830 is a MEDIUM-severity vulnerability in GNU Binutils, CVSS v3.1 5.3, EPSS 0.1% (4.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-90830 as of 2026-09-14; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-14

## What is CVE-2026-90830?

A security vulnerability has been detected in GNU Binutils 2.47. Impacted is the function _bfd_write_merged_section of the file bfd/merge.c of the component Section Merge. The manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through a bug report but has not responded yet.

The record classifies CVE-2026-90830 under weakness classes [CWE-476](https://intel.threadlinqs.com/cwe/CWE-476), [CWE-404](https://cwe.mitre.org/data/definitions/404.html). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 21 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R`)
- **CVSS v4.0 base score:** 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 4.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-14

## Is CVE-2026-90830 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [GNU](https://intel.threadlinqs.com/vendors/gnu): Binutils

## How to fix CVE-2026-90830

No vendor patch reference has been recorded for CVE-2026-90830 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-90830

No threat campaign in the Threadlinqs corpus currently references CVE-2026-90830, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-15.

**Exploit and proof of concept**

- [sourceware.org — exploit](https://sourceware.org/bugzilla/attachment.cgi?id=16884)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/403332)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/403332/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-90830)
- [vuldb.com — third party advisory (925229)](https://vuldb.com/submit/925229)

**Issue tracking and product pages**

- [sourceware.org — issue tracking](https://sourceware.org/bugzilla/show_bug.cgi?id=34452)
- [gnu.org — broken link](https://www.gnu.org/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-90830
Full detection coverage and IOCs for threats exploiting CVE-2026-90830 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp