Fixed packages 7
| Release | Package | Fixed in |
|---|---|---|
| Red Hat · RHEL 9 enterprise_linux:9::appstream | xorg-x11-server-Xwayland | 0:24.1.9-4.el9_8 |
| Red Hat · RHEL 9 enterprise_linux:9::appstream | xorg-x11-server-Xwayland-debuginfo | 0:24.1.9-4.el9_8 |
| Red Hat · RHEL 9 enterprise_linux:9::appstream | xorg-x11-server-Xwayland-debugsource | 0:24.1.9-4.el9_8 |
| Red Hat · RHEL 9 enterprise_linux:9::crb | xorg-x11-server-Xwayland | 0:24.1.9-4.el9_8 |
| Red Hat · RHEL 9 enterprise_linux:9::crb | xorg-x11-server-Xwayland-debuginfo | 0:24.1.9-4.el9_8 |
| Red Hat · RHEL 9 enterprise_linux:9::crb | xorg-x11-server-Xwayland-debugsource | 0:24.1.9-4.el9_8 |
| Red Hat · RHEL 9 enterprise_linux:9::crb | xorg-x11-server-Xwayland-devel | 0:24.1.9-4.el9_8 |
Vulnerabilities 3
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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…
References
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article
https://access.redhat.com/security/updates/classification/#important
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2451106
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2451109
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2451113
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advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_19344.json
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report
https://access.redhat.com/security/cve/CVE-2026-33999
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advisory
https://www.cve.org/CVERecord?id=CVE-2026-33999
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advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-33999
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report
https://access.redhat.com/security/cve/CVE-2026-34001
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advisory
https://www.cve.org/CVERecord?id=CVE-2026-34001
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advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-34001
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report
https://access.redhat.com/security/cve/CVE-2026-34003
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advisory
https://www.cve.org/CVERecord?id=CVE-2026-34003
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advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-34003