VDB-377849 · Submit #851190 · CVE-2026-15520

GNU LibreDWG 0.13.4-154-g0b573035 R2004 Section Decompression src/decode.c decompress_R2004_section heap-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	1.20

Summaryinfo

A vulnerability has been found in GNU LibreDWG 0.13.4-154-g0b573035 and classified as critical. Affected is the function decompress_R2004_section of the file src/decode.c of the component R2004 Section Decompression. The manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2026-15520. An attack has to be approached locally. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GNU LibreDWG 0.13.4-154-g0b573035. This issue affects the function decompress_R2004_section of the file src/decode.c of the component R2004 Section Decompression. 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 advisory is shared at github.com. The identification of this vulnerability is CVE-2026-15520. The exploitation is known to be easy. An attack has to be approached locally. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

Upgrading to version 0.14.8396 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3d0f9fc2eddbd6579c99af3111c37c98f03475d0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Image Processing Software

Vendor

Name

LibreDWG

Version

0.13.4-154-g0b573035

License

open-source

Website

Vendor: https://www.gnu.org/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: LibreDWG 0.14.8396
Patch: 3d0f9fc2eddbd6579c99af3111c37c98f03475d0

Timelineinfo

07/12/2026 Advisory disclosed
07/12/2026 +0 days VulDB entry created
07/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: 1251
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-15520 (🔒)
GCVE (CVE): GCVE-0-2026-15520
GCVE (VulDB): GCVE-100-377849
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/12/2026 13:32
Changes: 07/12/2026 13:32 (64)
Complete: 🔍
Submitter: Ech06
Cache ID: 216::103

Submitinfo

Accepted

Submit #851190: LibreDWG 0.13.4-154-g0b573035 (main branch, commit 0b573035, 2026-04-29) 内存损坏 (Heap Buffer Overflow - Write) (by Ech06)