CVE-2026-124996
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.
Executive briefing
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Evidence confidence: Not assessed Evidence-derived, not an exploitability verdict
Severity & attack characteristics
CVSS vector: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Technical explanation & impact
Technical root-cause details are not available in the current source record.
Assess the impact using the published CVSS metrics and the affected vendor component.
Affected products and versions
NVD has not supplied machine-readable vulnerable CPE product/version entries for this CVE. This is an information gap, not proof that no products are affected. Check the vendor advisory references below.
Remediation & validation
- Identify exposure by comparing the affected product and version ranges with your asset inventory, SBOM and externally exposed services.
- Review the linked vendor security advisory or patch notes. Upgrade to a vendor-confirmed fixed release; do not infer a fixed version from the CVE description.
- Until patched, consider restricting network access or disabling the affected feature where operationally safe. These are temporary controls, not a substitute for a vendor fix.
- Validate the remediation with a version check and vulnerability rescan, then retain change evidence.
No fixed version is displayed unless it is explicitly established by a vendor advisory. Follow the vendor's release notes for exact product and branch applicability.
Vendor advisories, patches & exploit references
- https://github.com/turboderp-org/exllamav3/ VENDOR cna@vuldb.com
- https://github.com/turboderp-org/exllamav3/commit/c9a57ae832a3035e264e0a412e1daf4ebb699b98 VENDOR cna@vuldb.com
- https://github.com/turboderp-org/exllamav3/issues/526 VENDOR cna@vuldb.com
- https://github.com/turboderp-org/exllamav3/releases/tag/v1.6.4 VENDOR cna@vuldb.com
- https://vuldb.com/cve/CVE-2026-124996 REFERENCE cna@vuldb.com
- https://vuldb.com/submit/1040627 REFERENCE cna@vuldb.com
- https://vuldb.com/vuln/433166 REFERENCE cna@vuldb.com
- https://vuldb.com/vuln/433166/cti REFERENCE cna@vuldb.com