CVE-2023-34318Public exploit

Code execution via unchecked HCOM dictionary size

Published Jul 10, 2023 · Updated Oct 1, 2024

Heap buffer overflow in SoX 14.4.3 allows context-dependent attackers to execute code via a crafted HCOM audio file. The HCOM startread function accepts a dictionary-size field without enforcing the format's 1-to-511-entry limit before parsing dictionary entries. Exploitation requires a user or application to process attacker-supplied HCOM content and can corrupt memory, crash the process, disclose data, or execute code.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap buffer overflow in SoX 14.4.3 allows context-dependent attackers to execute code via a crafted HCOM audio file. The HCOM startread function accepts a dictionary-size field without enforcing the format's 1-to-511-entry limit before parsing dictionary entries. Exploitation requires a user or application to process attacker-supplied HCOM content and can corrupt memory, crash the process, disclose data, or execute code.

The record

CVE
CVE-2023-34318
Published
Jul 10, 2023
Updated
Oct 1, 2024
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-122, CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Fedora Project · Fedora LinuxAffected versions are unavailable in this record.
Chris Bagwell · SoXAffected versions are unavailable in this record.
Fedora Project · Extra Packages for Enterprise LinuxAffected versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Red HatCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo