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6.6

ExLlamaV2 can write outside memory on local input

CVE-2026-116502 · published 9 days ago
Summary

The ExLlamaV2 software (versions up to 0.3.2) has a coding error that can cause it to write data beyond the intended memory area when a specific input is manipulated. This could lead to crashes or allow an attacker with local access to interfere with the program. Apply any available updates that fix the issue or avoid using untrusted data with the affected function.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
turboderp-org exllamav2 0.3.0
Original advisory text
turboderp-org ExLlamaV2 GPTQ Index q_matrix.cu make_sequential out-of-bounds write
A flaw has been found in turboderp-org ExLlamaV2 up to 0.3.2. The impacted element is the function QMatrix::make_sequential of the file exllamav2/exllamav2_ext/cuda/q_matrix.cu of the component GPTQ Index Handler. Executing a manipulation of the argument g_idx can lead to out-of-bounds write. The attack needs to be launched locally. The project was informed of the problem early through an issue report but has not responded yet.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.6 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-787Out-of-bounds Write
CWE-119Buffer Overflow
Timeline
Published26 Oct 2026
Updated3 Nov 2026
First seen26 Oct 2026
Sources
CVE-2026-116502 · NVD
CVE-2026-116502 · MITRE
CVE-2026-116502 · OSV
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