Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-56000: GLX contextTags Use-After-Free in CommonMakeCurrent() CVE-2026-55999: glamor Font Atlas Heap Buffer Overflow
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | xorg-x11-server-Xwayland | 0:24.1.3-1.amzn2023.0.6 |
| Amazon Linux · 2023 | xorg-x11-server-Xwayland-debuginfo | 0:24.1.3-1.amzn2023.0.6 |
| Amazon Linux · 2023 | xorg-x11-server-Xwayland-debugsource | 0:24.1.3-1.amzn2023.0.6 |
| Amazon Linux · 2023 | xorg-x11-server-Xwayland-devel | 0:24.1.3-1.amzn2023.0.6 |
Vulnerabilities 2
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Critical 9.0
xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()
Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.
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High 8.5
xorg-server / xwayland glamor font atlas Heap Buffer Overflow
Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a heap buffer overflow via SetFont due to missing glyph boundary checks.