CVE-2022-46457Public exploit

Assembler crash via out-of-bounds IEEE writer read

Published Jan 4, 2023 · Updated Apr 10, 2025

Out-of-bounds read in NASM 2.16 allows local users to crash the assembler by processing a crafted file with IEEE output enabled. The ieee_write_file routine in output/outieee.c performs an invalid memory read while finalizing IEEE-695 output, triggering a segmentation violation. Exploitation requires a user or automated build process to invoke NASM on attacker-controlled assembly input with the IEEE output format, and the observed consequence is termination of that NASM process.

CVSS severity5.5
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in NASM 2.16 allows local users to crash the assembler by processing a crafted file with IEEE output enabled. The ieee_write_file routine in output/outieee.c performs an invalid memory read while finalizing IEEE-695 output, triggering a segmentation violation. Exploitation requires a user or automated build process to invoke NASM on attacker-controlled assembly input with the IEEE output format, and the observed consequence is termination of that NASM process.

The record

CVE
CVE-2022-46457
Published
Jan 4, 2023
Updated
Apr 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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 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-125Out-of-bounds Read
T1499.004Application or System Exploitation
T1204.002Malicious File

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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