VDB-433165 · Submit #1040626 · CVE-2026-124994

Turboderp-org ExLlamaV3 up to 1.6.3 NGramEmbedding ngram.cu ngram_dequant head_bias out-of-bounds

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.
5.7	$0-$5k	0.00+

Summaryinfo

A vulnerability was found in Turboderp-org ExLlamaV3 up to 1.6.3. It has been classified as problematic. The impacted element is the function ngram_dequant of the file exllamav3/exllamav3_ext/ngram.cu of the component NGramEmbedding. This manipulation of the argument head_bias causes out-of-bounds. This vulnerability is registered as CVE-2026-124994. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Turboderp-org ExLlamaV3 up to 1.6.3 and classified as problematic. Affected by this vulnerability is the function ngram_dequant of the file exllamav3/exllamav3_ext/ngram.cu of the component NGramEmbedding. The manipulation of the argument head_bias with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-124994. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Upgrading to version 1.6.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch c9a57ae832a3035e264e0a412e1daf4ebb699b98 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.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Turboderp-org

Name

ExLlamaV3

Version

License

open-source

Website

Product: https://github.com/turboderp-org/exllamav3/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

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: ExLlamaV3 1.6.4
Patch: c9a57ae832a3035e264e0a412e1daf4ebb699b98

Timelineinfo

11/09/2026 Advisory disclosed
11/09/2026 +0 days VulDB entry created
11/09/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 525
Status: Confirmed

CNA: VulDB
CVE: CVE-2026-124994 (🔒)

GCVE (CVE): GCVE-0-2026-124994
GCVE (VulDB): GCVE-100-433165
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/09/2026 16:39
Changes: 11/09/2026 16:39 (64)
Complete: 🔍
Submitter: Dem00000
Cache ID: 216::103

Submitinfo

Accepted

Submit #1040626: turboderp-org exllamav3 commit 6ff3a17ea7f3 (version 1.4.8) Out-of-bounds Read (by Dem00000)