CVE-2023-29416Public exploitNetwork attack vector

Process crash via uncleared libsais transform buffers

Published Apr 6, 2023 · Updated Feb 13, 2025

Out-of-bounds write in libbzip3.a in bzip3 before 1.3.0 allows remote attackers to crash a process by supplying a crafted archive. In bz3_decode_block, the inverse Burrows-Wheeler transform passes uncleared sais_array and output buffers to libsais_unbwt, allowing a four-byte heap write beyond the allocation. A user or consuming application must decode the archive; the demonstrated consequence is process termination, with no reported data disclosure or code execution.

CVSS severity6.5
Medium
EPSS probability0.90%
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 write in libbzip3.a in bzip3 before 1.3.0 allows remote attackers to crash a process by supplying a crafted archive. In bz3_decode_block, the inverse Burrows-Wheeler transform passes uncleared sais_array and output buffers to libsais_unbwt, allowing a four-byte heap write beyond the allocation. A user or consuming application must decode the archive; the demonstrated consequence is process termination, with no reported data disclosure or code execution.

The record

CVE
CVE-2023-29416
Published
Apr 6, 2023
Updated
Feb 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.5CISA-ADPCVSS:3.1/AV:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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