FKIE_CVE-2026-34000

Vulnerability from fkie_nvd - Published: 2026-05-05 16:16 - Updated: 2026-06-17 10:38
Severity
6.1 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:19342
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20547
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20555
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20557
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20558
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20560
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20561
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20562
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20563
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20575
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20576
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:20590
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21699
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21712
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21715
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21716
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21718
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21741
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:21742
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22424
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22456
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:23254
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:23255
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:23496
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:24341
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-34000Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2451107Issue Tracking, Third Party Advisory
Impacted products
Vendor Product Version
x.org x_server -
redhat enterprise_linux 6.0
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0
To clipboard 

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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.