Summary
[21.1.3-20]
- CVE fix for: CVE-2026-33999, CVE-2026-34000, CVE-2026-34001
CVE-2026-34002, CVE-2026-34003
Resolves: https://redhat.atlassian.net/browse/RHEL-163191
Resolves: https://redhat.atlassian.net/browse/RHEL-163287
Resolves: https://redhat.atlassian.net/browse/RHEL-163245
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Oracle Linux · 8 | xorg-x11-server-Xwayland | 0:21.1.3-20.el8_10 |
Vulnerabilities 3
-
High 7.8
Xorg: xwayland: x.org x server: denial of service via integer underflow in xkb compatibility map handling
A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violat…
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High 7.8
Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption
A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, l…
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High 7.8
Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access
A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive infor…