CVE-2023-23108Public exploit

Process crash via unchecked Xasc operand

Published Feb 27, 2023 · Updated Mar 11, 2025

NULL pointer dereference in crasm 1.8-3 allows local users to crash the command-line assembler by supplying a crafted source file. The Xasc function assigns its unchecked oper argument to s and immediately dereferences s to read a delimiter, even when asmline passes a NULL operand. Exploitation requires the crafted file to be passed to the local CLI and terminates only that crasm process with a segmentation fault.

CVSS severity7.5
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in crasm 1.8-3 allows local users to crash the command-line assembler by supplying a crafted source file. The Xasc function assigns its unchecked oper argument to s and immediately dereferences s to read a delimiter, even when asmline passes a NULL operand. Exploitation requires the crafted file to be passed to the local CLI and terminates only that crasm process with a segmentation fault.

The record

CVE
CVE-2023-23108
Published
Feb 27, 2023
Updated
Mar 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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

7.5UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference

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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