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CVE-2026-124994— Turboderp-org ExLlamaV3 NGramEmbedding ngram.cu ngram_dequant out-of-bounds

Quick assessment

Affected

Turboderp-org ExLlamaV3

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Turboderp-org 的 ExLlamaV3（版本 1.6.3 及更早版本）中发现了一个安全漏洞。受影响的组件是 NGramEmbedding，具体位于文件中的函数。攻击者可通过操纵参数触发越界读取漏洞。该攻击可远程实施，且利用代码已公开，可能被用于实际攻击。将软件升级至 1.6.4 版本即可修复此问题，相关补丁的提交哈希为。建议尽快升级受影响的组件。

CVSS 6.3 · Medium Updated Nov 10, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Turboderp-org ExLlamaV3 NGramEmbedding ngram.cu ngram_dequant out-of-bounds

Source: CVE Program / CVE List V5

Vulnerability Description

A security flaw has been discovered in Turboderp-org ExLlamaV3 up to 1.6.3. The affected element is the function ngram_dequant of the file exllamav3/exllamav3_ext/ngram.cu of the component NGramEmbedding. The manipulation of the argument head_bias results in out-of-bounds read. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.4 is sufficient to fix this issue. The patch is identified as c9a57ae832a3035e264e0a412e1daf4ebb699b98. It is suggested to upgrade the affected component.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存读

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Turboderp-org	ExLlamaV3	1.6.0	`cpe:2.3:a:turboderp-org:exllamav3::::::::`

II. Public POCs for CVE-2026-124994

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-124994

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Other References for CVE-2026-124994 (1)

CVE-2026-124994 | Turboderp-org ExLlamaV3 up to 1.6.3 NGramEmbedding ngram.cu ngram_dequant head_bias out-of-bounds (Issue 525) vdb-entry technical-description

Other References for CVE-2026-124994 (8)

https://github.com/turboderp-org/exllamav3/releases/tag/v1.6.4 patch
https://github.com/turboderp-org/exllamav3/commit/c9a57ae832a3035e264e0a412e1daf4ebb699b98 patch
https://github.com/user-attachments/files/33598849/poc.zip exploit
https://github.com/turboderp-org/exllamav3/issues/525 issue-tracking
https://github.com/turboderp-org/exllamav3/ product
https://vuldb.com/cve/CVE-2026-124994 third-party-advisory
https://vuldb.com/vuln/433165/cti signature permissions-required
https://vuldb.com/submit/1040626 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-124994

IV. Related Vulnerabilities

Same product: ExLlamaV3

CVE-2026-84286
OOB Read/Write via Negative Array Index in exllamav3_ext Ker

Same vendor: Turboderp-org

Same weakness: CWE-125