DEBIAN-CVE-2026-63276

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Source

https://security-tracker.debian.org/tracker/CVE-2026-63276

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63276.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-63276

Upstream

CVE-2026-63276

Published

2026-09-22T12:17:13Z

Modified

2026-09-23T05:01:21Z

Severity

5.4 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator

Summary

[none]

Details

LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents. A stack buffer overflow existed in that conversion. The converted operators were written into a fixed size buffer with no check that they still fit, so a glyph emitting many operators wrote past the end of the buffer. In fixed versions the remaining capacity is tracked and the conversion stops when it is used up.

References

https://security-tracker.debian.org/tracker/CVE-2026-63276

Affected packages

Debian:12 / libreoffice

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4:7.*

4:7.4.5-3

4:7.4.7-1~bpo11+1

4:7.4.7-1

4:7.4.7-1+deb12u1~bpo11+1

4:7.4.7-1+deb12u1

4:7.4.7-1+deb12u2~bpo11+1

4:7.4.7-1+deb12u2

4:7.4.7-1+deb12u3

4:7.4.7-1+deb12u4

4:7.4.7-1+deb12u5

4:7.4.7-1+deb12u6

4:7.4.7-1+deb12u7

4:7.4.7-1+deb12u8

4:7.4.7-1+deb12u9

4:7.4.7-1+deb12u10

4:7.4.7-1+deb12u11

4:7.4.7-1+deb12u12

4:7.4.7-1+deb12u13

4:7.4.7-1+deb12u14

4:7.5.0~rc2-7

4:7.5.0~rc3-1

4:7.5.1~rc1-1

4:7.5.1~rc2-1

4:7.5.2~rc1-1

4:7.5.2~rc2-1

4:7.5.3~rc1-1

4:7.5.3~rc2-1

4:7.5.4~rc1-1

4:7.5.4~rc1-2

4:7.5.4~rc1-3

4:7.5.4~rc1-4

4:7.5.4~rc2-1

4:7.5.4-1

4:7.5.4-2

4:7.5.4-3

4:7.5.4-4

4:7.5.5~rc1-1

4:7.5.5~rc1-2

4:7.5.5~rc1-3

4:7.5.5~rc1-4

4:7.5.5~rc1-5

4:7.5.5~rc2-1

4:7.5.5-1

4:7.5.5-2

4:7.5.5-3~bpo12+1

4:7.5.5-3

4:7.5.5-4~bpo12+1

4:7.5.5-4

4:7.5.6-1~bpo12+1

4:7.5.6-1

4:7.5.7-1

4:7.5.8~rc1-1

4:7.5.8~rc1-2

4:7.5.8-1~bpo12+1

4:7.5.8-1

4:7.5.9~rc1-1~bpo12+1

4:7.5.9~rc1-1~bpo12+2

4:7.5.9~rc1-1

4:7.6.0~rc1-1

4:7.6.0~rc1-2

4:7.6.0~rc2-1

4:7.6.0~rc2-2

4:7.6.0~rc3-1

4:7.6.1~rc1-1

4:7.6.1~rc2-1

4:7.6.1~rc2-2

4:7.6.2-1

4:7.6.2-2

4:7.6.2-3

4:7.6.2-4

4:7.6.2-5

4:7.6.3~rc1-1

4:7.6.3~rc1-2

4:7.6.3~rc2-1

4:7.6.3~rc2-2

4:7.6.3-1

4:7.6.3-2

4:7.6.4~rc1-1~bpo12+1

4:7.6.4~rc1-1

4:24.*

4:24.2.0~alpha1-1

4:24.2.0~beta1-1

4:24.2.0~rc1-1

4:24.2.0~rc1-2

4:24.2.0~rc2-1

4:24.2.0~rc2-2~bpo12+1

4:24.2.0~rc2-2

4:24.2.0-1~bpo12+1

4:24.2.0-1

4:24.2.0-2

4:24.2.0-3

4:24.2.1~rc1-1

4:24.2.1~rc2-1

4:24.2.1-1

4:24.2.1-2

4:24.2.1-3

4:24.2.1-4

4:24.2.2~rc1-1

4:24.2.2~rc1-2

4:24.2.2~rc2-1

4:24.2.2~rc2-2

4:24.2.2-1

4:24.2.2-2

4:24.2.2-3

4:24.2.3~rc1-1

4:24.2.3~rc1-2

4:24.2.3~rc1-3

4:24.2.3~rc2-1

4:24.2.3-1~bpo12+1

4:24.2.3-1

4:24.2.3-2

4:24.2.4-1~bpo12+1

4:24.2.4-1

4:24.2.5-1~bpo12+1

4:24.2.5-1

4:24.2.5-2

4:24.2.5-3

4:24.2.5-4

4:24.2.6-1

4:24.2.6-2~bpo12+1

4:24.2.6-2

4:24.8.0~alpha1-1

4:24.8.0~alpha1-2

4:24.8.0~alpha1-3

4:24.8.0~alpha1-4

4:24.8.0~beta1-1

4:24.8.0~rc1-1

4:24.8.0~rc2-1

4:24.8.0~rc3-1

4:24.8.0~rc3-2

4:24.8.1~rc1-1

4:24.8.1-1

4:24.8.1-2

4:24.8.2~rc1-1

4:24.8.2-1~bpo12+1

4:24.8.2-1

4:24.8.2-2

4:24.8.3-1~bpo12+1

4:24.8.3-1

4:24.8.3-2

4:24.8.3-3

4:24.8.4-1~bpo12+1

4:24.8.4-1

4:24.8.4-2

4:24.8.4-3

4:24.8.4-4

4:24.8.5-1

4:24.8.5-2~bpo12+1

4:24.8.5-2~bpo12+2

4:24.8.5-2

4:25.*

4:25.2.0~alpha1-1

4:25.2.0~beta1-1

4:25.2.0~beta1-2

4:25.2.0~rc1-1

4:25.2.0~rc1-2

4:25.2.0~rc1-3

4:25.2.0~rc1-4

4:25.2.0~rc2-1

4:25.2.0~rc3-1

4:25.2.0~rc3-2

4:25.2.1~rc1-1

4:25.2.1~rc1-2

4:25.2.1~rc2-1

4:25.2.1-1

4:25.2.1-2

4:25.2.1-3~bpo12+1

4:25.2.1-3

4:25.2.2~rc1-1

4:25.2.2~rc2-1

4:25.2.2-1~bpo12+1

4:25.2.2-1

4:25.2.2-2

4:25.2.2-3~bpo12+1

4:25.2.2-3

4:25.2.3~rc1-1

4:25.2.3~rc1-2

4:25.2.3~rc2-1

4:25.2.3-1

4:25.2.3-2~bpo12+1

4:25.2.3-2

4:25.8.0~alpha1-1

4:25.8.0~alpha1-2

4:25.8.0~beta1-1

4:25.8.0~rc1-1

4:25.8.0~rc1-2

4:25.8.0~rc2-1

4:25.8.0~rc2-2

4:25.8.0~rc3-1

4:25.8.0~rc4-1

4:25.8.0~rc4-2

4:25.8.0-1~bpo13+1

4:25.8.0-1

4:25.8.1~rc1-1

4:25.8.1-1~bpo13+1

4:25.8.1-1

4:25.8.2~rc1-1

4:25.8.2~rc2-1

4:25.8.2-1

4:25.8.2-2

4:25.8.2-3~bpo13+1

4:25.8.2-3

4:25.8.3~rc1-1

4:25.8.3~rc2-1

4:25.8.3-1~bpo13+1

4:25.8.3-1

4:25.8.3-1+ports

4:25.8.4-1~bpo13+1

4:25.8.4-1

4:26.*

4:26.2.0~alpha1-1

4:26.2.0~alpha1-2

4:26.2.0~alpha1-3

4:26.2.0~beta1-1

4:26.2.0~rc1-1

4:26.2.0~rc2-1

4:26.2.0~rc3-1

4:26.2.0-1~bpo13+1

4:26.2.0-1

4:26.2.1~rc1-1

4:26.2.1~rc2-1

4:26.2.1-1~bpo13+1

4:26.2.1-1

4:26.2.2.1-1

4:26.2.2.1-2

4:26.2.2.2-1

4:26.2.2.2-2

4:26.2.2.2-3~bpo13+1

4:26.2.2.2-3

4:26.2.3.1-1

4:26.2.3.2-1

4:26.2.3.2-2~bpo13+1

4:26.2.3.2-2

4:26.2.4.1-1

4:26.2.4.2-1~bpo13+1

4:26.2.4.2-1

4:26.2.4.2-2

4:26.2.5.2-1

4:26.2.5.2-2~bpo13+1

4:26.2.5.2-2

4:26.8.0.0.alpha1-1

4:26.8.0.0.alpha1-2

4:26.8.0.0.alpha1-3

4:26.8.0.0.alpha1-4

4:26.8.0.0.beta1-1

4:26.8.0.1-1

4:26.8.0.2-1

4:26.8.0.3-1

4:26.8.0.3-2~bpo13+1

4:26.8.0.3-2

4:26.8.1.1-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63276.json"

Debian:13 / libreoffice

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4:25.*

4:25.2.3-2

4:25.2.3-2+deb13u1

4:25.2.3-2+deb13u2~bpo12+1

4:25.2.3-2+deb13u2

4:25.2.3-2+deb13u3~bpo12+1

4:25.2.3-2+deb13u3

4:25.2.3-2+deb13u4

4:25.2.3-2+deb13u5~bpo12+1

4:25.2.3-2+deb13u5

4:25.2.3-2+deb13u6

4:25.8.0~alpha1-1

4:25.8.0~alpha1-2

4:25.8.0~beta1-1

4:25.8.0~rc1-1

4:25.8.0~rc1-2

4:25.8.0~rc2-1

4:25.8.0~rc2-2

4:25.8.0~rc3-1

4:25.8.0~rc4-1

4:25.8.0~rc4-2

4:25.8.0-1~bpo13+1

4:25.8.0-1

4:25.8.1~rc1-1

4:25.8.1-1~bpo13+1

4:25.8.1-1

4:25.8.2~rc1-1

4:25.8.2~rc2-1

4:25.8.2-1

4:25.8.2-2

4:25.8.2-3~bpo13+1

4:25.8.2-3

4:25.8.3~rc1-1

4:25.8.3~rc2-1

4:25.8.3-1~bpo13+1

4:25.8.3-1

4:25.8.3-1+ports

4:25.8.4-1~bpo13+1

4:25.8.4-1

4:26.*

4:26.2.0~alpha1-1

4:26.2.0~alpha1-2

4:26.2.0~alpha1-3

4:26.2.0~beta1-1

4:26.2.0~rc1-1

4:26.2.0~rc2-1

4:26.2.0~rc3-1

4:26.2.0-1~bpo13+1

4:26.2.0-1

4:26.2.1~rc1-1

4:26.2.1~rc2-1

4:26.2.1-1~bpo13+1

4:26.2.1-1

4:26.2.2.1-1

4:26.2.2.1-2

4:26.2.2.2-1

4:26.2.2.2-2

4:26.2.2.2-3~bpo13+1

4:26.2.2.2-3

4:26.2.3.1-1

4:26.2.3.2-1

4:26.2.3.2-2~bpo13+1

4:26.2.3.2-2

4:26.2.4.1-1

4:26.2.4.2-1~bpo13+1

4:26.2.4.2-1

4:26.2.4.2-2

4:26.2.5.2-1

4:26.2.5.2-2~bpo13+1

4:26.2.5.2-2

4:26.8.0.0.alpha1-1

4:26.8.0.0.alpha1-2

4:26.8.0.0.alpha1-3

4:26.8.0.0.alpha1-4

4:26.8.0.0.beta1-1

4:26.8.0.1-1

4:26.8.0.2-1

4:26.8.0.3-1

4:26.8.0.3-2~bpo13+1

4:26.8.0.3-2

4:26.8.1.1-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63276.json"

Debian:14 / libreoffice

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4:26.2.5.2-1

Affected versions

4:25.*

4:25.2.3-2

4:25.8.0~alpha1-1

4:25.8.0~alpha1-2

4:25.8.0~beta1-1

4:25.8.0~rc1-1

4:25.8.0~rc1-2

4:25.8.0~rc2-1

4:25.8.0~rc2-2

4:25.8.0~rc3-1

4:25.8.0~rc4-1

4:25.8.0~rc4-2

4:25.8.0-1~bpo13+1

4:25.8.0-1

4:25.8.1~rc1-1

4:25.8.1-1~bpo13+1

4:25.8.1-1

4:25.8.2~rc1-1

4:25.8.2~rc2-1

4:25.8.2-1

4:25.8.2-2

4:25.8.2-3~bpo13+1

4:25.8.2-3

4:25.8.3~rc1-1

4:25.8.3~rc2-1

4:25.8.3-1~bpo13+1

4:25.8.3-1

4:25.8.3-1+ports

4:25.8.4-1~bpo13+1

4:25.8.4-1

4:26.*

4:26.2.0~alpha1-1

4:26.2.0~alpha1-2

4:26.2.0~alpha1-3

4:26.2.0~beta1-1

4:26.2.0~rc1-1

4:26.2.0~rc2-1

4:26.2.0~rc3-1

4:26.2.0-1~bpo13+1

4:26.2.0-1

4:26.2.1~rc1-1

4:26.2.1~rc2-1

4:26.2.1-1~bpo13+1

4:26.2.1-1

4:26.2.2.1-1

4:26.2.2.1-2

4:26.2.2.2-1

4:26.2.2.2-2

4:26.2.2.2-3~bpo13+1

4:26.2.2.2-3

4:26.2.3.1-1

4:26.2.3.2-1

4:26.2.3.2-2~bpo13+1

4:26.2.3.2-2

4:26.2.4.1-1

4:26.2.4.2-1~bpo13+1

4:26.2.4.2-1

4:26.2.4.2-2

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63276.json"