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PT-2026-56334

🗓️ 08 Jul 2026 00:00:00Reported by Positive TechnologiesType 
ptsecurity
 ptsecurity
🔗 dbugs.ptsecurity.com👁 7 Views

Local attackers can trigger a heap overflow in X server before 21.2.24 and Xwayland before 24.1.13 via SetFont due to missing glyph boundary checks.

Related
Refs
ReporterTitlePublishedViews
Family
FreeBSD
xwayland -- Multiple vulnerabilities
7 Jul 202600:00
freebsd
FreeBSD
xorg-server -- Multiple vulnerabilities
7 Jul 202600:00
freebsd
ATTACKERKB
CVE-2026-55999
8 Jul 202608:07
attackerkb
AlpineLinux
CVE-2026-55999
8 Jul 202608:07
alpinelinux
Circl
CVE-2026-55999
8 Jul 202610:17
circl
CVE
CVE-2026-55999
8 Jul 202608:07
cve
Cvelist
CVE-2026-55999 xorg-server / xwayland glamor font atlas Heap Buffer Overflow
8 Jul 202608:07
cvelist
Debian CVE
CVE-2026-55999
8 Jul 202608:07
debiancve
EUVD
EUVD-2026-42188
8 Jul 202608:07
euvd
NVD
CVE-2026-55999
8 Jul 202609:16
nvd
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08 Jul 2026 00:00Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.18.5
7