CVE-2023-34432: A heap buffer overflow vulnerability was found in sox, in the lsx_readbuf function at sox/src/formats_i.c:98:1

This month

HIGH 7.8WATCHLISTUPGRADEDOWNGRADEMITIGATE

CVE-2023-34432 is a high-severity flaw (CVSS 7.8) affecting sound exchange, extra packages for enterprise linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A heap buffer overflow vulnerability was found in sox, in the lsx_readbuf function at sox/src/formats_i.c:98:16. This flaw can lead to a denial of service, code execution, or information disclosure.

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-122, CWE-787
Published	2023-07-10
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · redhat · sound exchange project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-10 21:15 UTCPublished CVE record published
2026-06-17 06:03 UTCUpdated Record last modified

sound exchange project sound exchange UPGRADE

Affected: <= 14.4.3

Fixed in: newer than 14.4.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sound-exchange || rpm -q sound-exchange || sound-exchange --version

2. UPGRADE to newer than 14.4.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sound-exchange

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sound-exchange

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject extra packages for enterprise linux DOWNGRADE

Affected: 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

1. Check installed version

apt-cache policy extra-packages-for-enterprise-linux || rpm -q extra-packages-for-enterprise-linux || extra-packages-for-enterprise-linux --version

2. No fixed release: DOWNGRADE to a release before 8.0 (Debian / Ubuntu)

apt-cache madison extra-packages-for-enterprise-linux sudo apt install extra-packages-for-enterprise-linux=<VERSION_BEFORE_8.0> sudo apt-mark hold extra-packages-for-enterprise-linux

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list extra-packages-for-enterprise-linux sudo dnf downgrade extra-packages-for-enterprise-linux-<VERSION_BEFORE_8.0> sudo dnf versionlock add extra-packages-for-enterprise-linux

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

fedoraproject fedora MITIGATE

Affected: 38

Fixed in: no fixed release known

Safe to downgrade to: a release before 38

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-34432?

sound exchange: upgrade to newer than 14.4.3; extra packages for enterprise linux: downgrade or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-34432 being exploited?

CVE-2023-34432 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-34432 affect?

CVE-2023-34432 affects sound exchange, extra packages for enterprise linux, fedora. Severity is high (CVSS 7.8). A heap buffer overflow vulnerability was found in sox, in the lsx_readbuf function at sox/src/formats_i.c:98:16. This flaw can lead to a denial of service, code execution, or information disclosure.

How urgent is CVE-2023-34432?

Priority 46/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2023-34318 HIGH 7.8 DOWNGRADE DOWNGRADE A heap buffer overflow vulnerability was found in sox, in the startread function at sox/src/hcom.c:160:41
CVE-2023-32627 MEDIUM 6.2 DOWNGRADE DOWNGRADE A floating point exception vulnerability was found in sox, in the read_samples function at sox/src/voc.c:334:1
CVE-2023-26590 MEDIUM 6.2 DOWNGRADE DOWNGRADE A floating point exception vulnerability was found in sox, in the lsx_aiffstartwrite function at sox/src/aiff.
CVE-2021-33844 MEDIUM 5.5 DOWNGRADE A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file
CVE-2021-23210 MEDIUM 5.5 DOWNGRADE A floating point exception (divide-by-zero) issue was discovered in SoX in functon read_samples() of voc.c fil

References

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