# CVE-2026-124996: Turboderp-org ExLlamaV3 hash-MoE routing routing.cu routing_sel_norm_kernel out-of-bounds

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

A weakness has been identified in Turboderp-org ExLlamaV3 up to 1.6.3. The impacted element is the function routing_sel_norm_kernel of the file exllamav3/exllamav3_ext/routing.cu of the component hash-MoE routing. This manipulation of the argument gate.tid2eid causes out-of-bounds read. Remote exploitation of the attack is possible. Upgrading to version 1.6.4 is sufficient to resolve this issue. Patch name: c9a57ae832a3035e264e0a412e1daf4ebb699b98. Upgrading the affected component is recommended.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/turboderp-org/exllamav3/commit/c9a57ae832a3035e264e0a412e1daf4ebb699b98
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/turboderp-org/exllamav3/releases/tag/v1.6.4

## Affected products and versions

- Turboderp-org / ExLlamaV3: 1.6.0 (affected); 1.6.1 (affected); 1.6.2 (affected); 1.6.3 (affected); 1.6.4 (unaffected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X; source: CNA: VulDB

- CVSS 3.1: 6.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 6.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 7.5 (high); AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-125, CWE-119

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/433166 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/433166/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-124996 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1040627 (CNA: VulDB; third-party-advisory)

- https://github.com/turboderp-org/exllamav3/issues/526 (CNA: VulDB; issue-tracking)

- https://github.com/turboderp-org/exllamav3/commit/c9a57ae832a3035e264e0a412e1daf4ebb699b98 (CNA: VulDB; patch)

- https://github.com/turboderp-org/exllamav3/releases/tag/v1.6.4 (CNA: VulDB; patch)

- https://github.com/turboderp-org/exllamav3/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-124996; retrieved 2026-11-09; source updated 2026-11-09

Revision: 4ac32a5ca5cc0c088f6e8083a9b14cdd9484370358b8eb7762e7a8bc3c6e42d4

Canonical: https://y2.dev/cve/CVE-2026-124996

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