CVE-2023-39427: In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share v12 SP0 Build (1204.77), the affected applic

Q: How do I fix CVE-2023-39427?

cobalt: upgrade to 12.4.1204.200; graphite: upgrade to newer than 13.0.48; xenon: upgrade to 12.4.1204.200. Exact commands for each OS are on this page.

Q: Is CVE-2023-39427 being exploited?

CVE-2023-39427 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-39427 affect?

CVE-2023-39427 affects cobalt, graphite, xenon. Severity is high (CVSS 7.8). In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share v12 SP0 Build (1204.77), the affected applications lack proper validation of user-supplied data when parsing XE files. This could lead to an out-of-bounds write. An attacker

Routine

HIGH 7.8UPGRADEUPGRADEUPGRADE

CVE-2023-39427 is a high-severity flaw (CVSS 7.8) affecting cobalt, graphite, xenon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share v12 SP0 Build (1204.77), the affected applications lack proper validation of user-supplied data when parsing XE files. This could lead to an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process.

Why this priority

High severity

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	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-10-26
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: ashlar

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

Am I affected?

Timeline

2023-10-26 20:15 UTCPublished CVE record published
2026-06-17 06:12 UTCUpdated Record last modified

ashlar cobalt UPGRADE

Affected: < 12.4.1204.200

Fixed in: 12.4.1204.200

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cobalt || rpm -q cobalt || cobalt --version

2. UPGRADE to 12.4.1204.200 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cobalt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cobalt

Note

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

ashlar graphite UPGRADE

Affected: <= 13.0.48

Fixed in: newer than 13.0.48

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy graphite || rpm -q graphite || graphite --version

2. UPGRADE to newer than 13.0.48 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade graphite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade graphite

Note

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

ashlar xenon UPGRADE

Affected: < 12.4.1204.200

Fixed in: 12.4.1204.200

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy xenon || rpm -q xenon || xenon --version

2. UPGRADE to 12.4.1204.200 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xenon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xenon

Note

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

ashlar argon UPGRADE

Affected: < 12.4.1204.200

Fixed in: 12.4.1204.200

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy argon || rpm -q argon || argon --version

2. UPGRADE to 12.4.1204.200 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade argon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade argon

Note

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

ashlar lithium UPGRADE

Affected: < 12.4.1204.200

Fixed in: 12.4.1204.200

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy lithium || rpm -q lithium || lithium --version

2. UPGRADE to 12.4.1204.200 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lithium

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lithium

Note

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

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-2023-39427?

cobalt: upgrade to 12.4.1204.200; graphite: upgrade to newer than 13.0.48; xenon: upgrade to 12.4.1204.200. Exact commands for each OS are on this page.

Is CVE-2023-39427 being exploited?

CVE-2023-39427 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-2023-39427 affect?

CVE-2023-39427 affects cobalt, graphite, xenon. Severity is high (CVSS 7.8). In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share v12 SP0 Build (1204.77), the affected applications lack proper validation of user-supplied data when parsing XE files. This could lead to an out-of-bounds write. An attacker

How urgent is CVE-2023-39427?

Priority 31/100. High severity

Related CVEs

CVE-2025-65085 CRITICAL 9.8 UPGRADE UPGRADE A Heap-based Buffer Overflow vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Coba
CVE-2025-65084 CRITICAL 9.8 UPGRADE UPGRADE An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Sha
CVE-2025-65086 HIGH 7.8 UPGRADE UPGRADE An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Sha
CVE-2025-65087 HIGH 7.8 UPGRADE UPGRADE An Out-of-Bounds Read vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Shar
CVE-2025-65088 HIGH 7.8 UPGRADE UPGRADE An Out-of-Bounds Read vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Shar

References

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