LibRaw d20315b File x3f_thumb_loader integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in LibRaw d20315b. Affected by this issue is the function x3f_thumb_loader of the component File Handler. The manipulation results in integer overflow. This vulnerability is reported as CVE-2026-20889. The attack can be launched remotely. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in LibRaw d20315b. Affected is the function x3f_thumb_loader of the component File Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

The advisory is shared for download at talosintelligence.com. This vulnerability is traded as CVE-2026-20889 since 01/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 307413 (Fedora 43 : mingw-LibRaw (2026-635a001215)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (307413). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (talos): 🔒

CVSSv2info

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

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
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: 307413
Nessus Name: Fedora 43 : mingw-LibRaw (2026-635a001215)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/26/2026 CVE reserved
04/07/2026 +70 days Advisory disclosed
04/07/2026 +0 days VulDB entry created
04/18/2026 +11 days VulDB entry last update

Sourcesinfo

Advisory: TALOS-2026-2358
Status: Confirmed

CVE: CVE-2026-20889 (🔒)
GCVE (CVE): GCVE-0-2026-20889
GCVE (VulDB): GCVE-100-355752

Entryinfo

Created: 04/07/2026 16:38
Updated: 04/18/2026 08:17
Changes: 04/07/2026 16:38 (64), 04/18/2026 08:17 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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