CVE-2023-29941Public exploit

Local compiler crash via unchecked SortOp parent

Published May 5, 2023 · Updated Jan 29, 2025

Denial of service in LLVM MLIR allows local users to crash mlir-opt by processing crafted MLIR with the sparse-buffer-rewrite pass. The matchAndRewriteSortOp routine assumes its SortOp has a func::FuncOp parent and continues with an empty insertion point when that assumption fails. Exploitation requires local execution of mlir-opt against specially structured input; the documented consequence is termination of the compiler process, not code execution or data exposure.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in LLVM MLIR allows local users to crash mlir-opt by processing crafted MLIR with the sparse-buffer-rewrite pass. The matchAndRewriteSortOp routine assumes its SortOp has a func::FuncOp parent and continues with an empty insertion point when that assumption fails. Exploitation requires local execution of mlir-opt against specially structured input; the documented consequence is termination of the compiler process, not code execution or data exposure.

The record

CVE
CVE-2023-29941
Published
May 5, 2023
Updated
Jan 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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