DEBIAN-CVE-2026-79590

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Source
https://security-tracker.debian.org/tracker/CVE-2026-79590
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79590.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-79590
Upstream
Published
2026-09-10T22:17:00Z
Modified
2026-09-15T09:03:17Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.

References

Affected packages

Debian:12 / mruby

Package

Name
mruby
Purl
pkg:deb/debian/mruby?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.0-3
3.2.0-1
3.2.0-2
3.3.0~rc2-1
3.3.0-1
3.4.0-1~exp1
3.4.0-1~exp2
3.4.0-1
3.4.0-2
3.4.0-3
4.*
4.0.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79590.json"

Debian:13 / mruby

Package

Name
mruby
Purl
pkg:deb/debian/mruby?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.3.0-1
3.4.0-1~exp1
3.4.0-1~exp2
3.4.0-1
3.4.0-2
3.4.0-3
4.*
4.0.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79590.json"

Debian:14 / mruby

Package

Name
mruby
Purl
pkg:deb/debian/mruby?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.3.0-1
3.4.0-1~exp1
3.4.0-1~exp2
3.4.0-1
3.4.0-2
3.4.0-3
4.*
4.0.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79590.json"