OpenPrinting CUPS up to 2.4.16 on Linux Attributes heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenPrinting CUPS up to 2.4.16 on Linux and classified as critical. Affected by this vulnerability is an unknown functionality of the component Attributes Handler. The manipulation results in heap-based overflow. This vulnerability is reported as CVE-2026-34979. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in OpenPrinting CUPS up to 2.4.16 on Linux. Affected is an unknown code of the component Attributes Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as 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(). This is going to have an impact on availability. CVE summarizes:

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building filter option strings from job attribute. At time of publication, there are no publicly available patches.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-34979 since 03/31/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/06/2026).

The vulnerability scanner Nessus provides a plugin with the ID 304967 (Linux Distros Unpatched Vulnerability : CVE-2026-34979), 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 (304967), EUVD (EUVD-2026-18885) and CERT Bund (WID-SEC-2026-0947). Once again VulDB remains the best source for vulnerability data.

Affected

  • Amazon Linux 2
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • SUSE openSUSE
  • Microsoft Azure Linux
  • Open Source CUPS

Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (GitHub_M): 🔒

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: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 304967
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-34979

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/31/2026 CVE reserved
04/03/2026 +3 days Advisory disclosed
04/03/2026 +0 days VulDB entry created
07/06/2026 +94 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-34979 (🔒)
GCVE (CVE): GCVE-0-2026-34979
GCVE (VulDB): GCVE-100-355212
EUVD: 🔒
CERT Bund: WID-SEC-2026-0947 - CUPS: Mehrere Schwachstellen

Entryinfo

Created: 04/03/2026 23:32
Updated: 07/06/2026 04:16
Changes: 04/03/2026 23:32 (64), 04/04/2026 05:09 (1), 04/08/2026 14:29 (2), 05/02/2026 08:13 (7), 07/06/2026 04:16 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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