Catalogo CVE
CVE-2026-56003
A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using
- Gravità
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 22, 2026
A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libxfont | sid | 1:2.0.9-1 | fixed |
| Debian | libxfont | forky | 1:2.0.9-1 | fixed |
| Debian | libxfont | trixie | 1:2.0.6-1+deb13u1 | fixed |
| Debian | libxfont | trixie-security | 1:2.0.6-1+deb13u1 | fixed |
| Debian | libxfont | bookworm | 1:2.0.6-1 | vulnerable |
| Debian | libxfont | bookworm-security | 1:2.0.6-1+deb12u1 | fixed |
| Cpe | libxfont | Not reported | 2.0.8 | fixed |
| Cpe | libxfont | Not reported | 1:2.0.6-1+deb13u1build0.24.04.2 | fixed |
| Cpe | libxfont-dev | Not reported | 1:2.0.6-1+deb13u1build0.24.04.2 | fixed |
| Cpe | libxfont2 | Not reported | 1:2.0.6-1+deb13u1build0.24.04.2 | fixed |
| Ubuntu | libxfont | pro | 1:2.0.3-1 | vulnerable |
| Ubuntu | libxfont | pro | 1:2.0.3-1ubuntu0.20.04.1~esm2 | fixed |
| Ubuntu | libxfont2 | 16.04 | 1:2.0.1-3~ubuntu16.04.1 | vulnerable |
| Ubuntu | libxfont2 | 16.04 | 1:2.0.1-3~ubuntu16.04.2 | vulnerable |
| Ubuntu | libxfont2 | 16.04 | 1:2.0.1-3~ubuntu16.04.3 | vulnerable |
| Ubuntu | libxfont | 22.04 | 1:2.0.4-1build3 | vulnerable |
| Ubuntu | libxfont | 22.04 | 1:2.0.5-1 | vulnerable |
| Ubuntu | libxfont | 22.04 | 1:2.0.5-1build1 | vulnerable |
| Ubuntu | libxfont | 22.04 | 1:2.0.5-1ubuntu0.2 | fixed |
| Ubuntu | libxfont | 24.04 | 1:2.0.6-1 | vulnerable |
| Ubuntu | libxfont | 24.04 | 1:2.0.6-1build1 | vulnerable |
| Ubuntu | libxfont | 24.04 | 1:2.0.6-1+deb13u1build0.24.04.2 | fixed |
| Ubuntu | libxfont | 25.10 | 1:2.0.6-1build1 | vulnerable |
| Ubuntu | libxfont | 26.04 | 1:2.0.6-1build1 | vulnerable |
| Ubuntu | libxfont | 26.04 | 1:2.0.6-1build2 | vulnerable |
| Ubuntu | libxfont | 26.04 | 1:2.0.6-2 | vulnerable |
| Ubuntu | libxfont | 26.04 | 1:2.0.6-2ubuntu0.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libxfont | source | sid | 1:2.0.8-1 | not yet assigned | Not reported | [1141702] |
| Debian | libxfont | source | forky | 1:2.0.8-1 | not yet assigned | Not reported | [1141702] |
| Debian | libxfont | source | trixie | 1:2.0.6-1+deb13u1 | not yet assigned | Not reported | [1141702] |
| Debian | libxfont | source | bookworm | 1:2.0.6-1+deb12u1 | not yet assigned | Not reported | [1141702] |
| Cpe | libxfont | cpe | Not reported | 2.0.8 | Not reported | Not reported | Not reported |
| Cpe | libxfont | cpe | Not reported | 1:2.0.6-1+deb13u1build0.24.04.2 | Not reported | Not reported | Not reported |
| Cpe | libxfont-dev | cpe | Not reported | 1:2.0.6-1+deb13u1build0.24.04.2 | Not reported | Not reported | Not reported |
| Cpe | libxfont2 | cpe | Not reported | 1:2.0.6-1+deb13u1build0.24.04.2 | Not reported | Not reported | Not reported |
| Ubuntu | libxfont | deb | pro | 1:2.0.3-1ubuntu0.20.04.1~esm2 | Not reported | UBUNTU-CVE-2026-56003 | Not reported |
| Ubuntu | libxfont | deb | 22.04 | 1:2.0.5-1ubuntu0.2 | Not reported | UBUNTU-CVE-2026-56003 | Not reported |
| Ubuntu | libxfont | deb | 24.04 | 1:2.0.6-1+deb13u1build0.24.04.2 | Not reported | UBUNTU-CVE-2026-56003 | Not reported |
| Ubuntu | libxfont | deb | 26.04 | 1:2.0.6-2ubuntu0.2 | Not reported | UBUNTU-CVE-2026-56003 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libxfont2]Interessata
Pacchetto sorgente: [libxfont]
Dettagli (4)
1:2.0.6-1· amd64 · bookwormInteressata · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
1:2.0.6-1· arm64 · bookwormInteressata · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
1:2.0.6-1+deb12u1· amd64 · bookworm-securityCorretta · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
1:2.0.6-1+deb12u1· arm64 · bookworm-securityCorretta · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
- [libxfont-dev]Interessata
Pacchetto sorgente: [libxfont]
Dettagli (4)
1:2.0.6-1· amd64 · bookwormInteressata · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
1:2.0.6-1· arm64 · bookwormInteressata · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
1:2.0.6-1+deb12u1· amd64 · bookworm-securityCorretta · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
1:2.0.6-1+deb12u1· arm64 · bookworm-securityCorretta · Corretta:
1:2.0.6-1+deb12u1nvd · libxfont · debian · bookworm; nvd · libxfont · debian · 12
[Debian 13 (Trixie)]
- [libxfont2]Interessata
Pacchetto sorgente: [libxfont]
Dettagli (4)
1:2.0.6-1+b3· amd64 · trixieInteressata · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
1:2.0.6-1+b3· arm64 · trixieInteressata · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
1:2.0.6-1+deb13u1· amd64 · trixie-securityCorretta · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
1:2.0.6-1+deb13u1· arm64 · trixie-securityCorretta · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
- [libxfont-dev]Interessata
Pacchetto sorgente: [libxfont]
Dettagli (4)
1:2.0.6-1+b3· amd64 · trixieInteressata · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
1:2.0.6-1+b3· arm64 · trixieInteressata · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
1:2.0.6-1+deb13u1· amd64 · trixie-securityCorretta · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
1:2.0.6-1+deb13u1· arm64 · trixie-securityCorretta · Corretta:
1:2.0.6-1+deb13u1nvd · libxfont · debian · 13
Osservato:
Riferimenti
- [https://access.redhat.com/errata/RHSA-2026:47079]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_2793-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-56003]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-56003]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-56003]
- [https://security-tracker.debian.org/tracker/CVE-2026-56003]
- [https://ubuntu.com/security/notices/USN-8560-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2378.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]