FKIE_CVE-2026-34002

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 vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.
References
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-2026-34002Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2451112Issue 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.