# CVE-2026-90831 — GNU Binutils

> As of 2026-09-14, CVE-2026-90831 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-2026-90831 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-2026-90831?

A vulnerability was detected in GNU Binutils 2.47. The affected element is the function _bfd_elf_strtab_delref of the file bfd/elf-strtab.c of the component ELF String Table. The manipulation results in memory corruption. The attack requires a local approach. 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.

The record classifies CVE-2026-90831 under weakness class [CWE-119](https://intel.threadlinqs.com/cwe/CWE-119). 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-2026-90831 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-2026-90831

No vendor patch reference has been recorded for CVE-2026-90831 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-2026-90831

No threat campaign in the Threadlinqs corpus currently references CVE-2026-90831, 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=16886)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/403333)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/403333/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-90831)
- [vuldb.com — third party advisory (925230)](https://vuldb.com/submit/925230)

**Issue tracking and product pages**

- [sourceware.org — issue tracking](https://sourceware.org/bugzilla/show_bug.cgi?id=34454)
- [gnu.org — broken link](https://www.gnu.org/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-90831
Full detection coverage and IOCs for threats exploiting CVE-2026-90831 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp