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CVE-2026-56003

libXfont2 computeProps Property Buffer Heap Buffer Overflow

High8.5EPSS 0.40%
Published
Updated
Reserved
Assigned by
suse

Description

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.

Scores

CVSS scores of CVE-2026-56003, by who scored it
Scored byCVSSScoreVector
suseCNA (assigner)3.1High8.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVDNVD · Analyzed3.1High8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.40% · top 66% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.5.

Weakness

Affected products

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .