GNU Binutils XCOFF heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in GNU Binutils and classified as critical. This vulnerability affects unknown code of the component XCOFF Handler. The manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2026-6846. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GNU Binutils (the affected version unknown). This issue affects an unknown part of the component XCOFF Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in binutils. A heap-buffer-overflow vulnerability exists when processing a specially crafted XCOFF (Extended Common Object File Format) object file during linking. A local attacker could trick a user into processing this malicious file, which could lead to arbitrary code execution, allowing the attacker to run unauthorized commands, or cause a denial of service, making the system unavailable.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2026-6846 since 04/22/2026. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 309646 (Linux Distros Unpatched Vulnerability : CVE-2026-6846), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (309646) and CERT Bund (WID-SEC-2026-1217). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Open Source binutils

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (redhat): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 309646
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-6846

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/22/2026 Advisory disclosed
04/22/2026 +0 days CVE reserved
04/22/2026 +0 days VulDB entry created
04/23/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: access.redhat.com
Status: Not defined

CVE: CVE-2026-6846 (🔒)
GCVE (CVE): GCVE-0-2026-6846
GCVE (VulDB): GCVE-100-358823
CERT Bund: WID-SEC-2026-1217 - binutils: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2026 12:37
Updated: 04/23/2026 07:51
Changes: 04/22/2026 12:37 (62), 04/22/2026 18:21 (7), 04/23/2026 07:51 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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