CVE-2026-34003

Summary

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 information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 100:24.1.5-6.el10_1 < *unaffected
Red HatRed Hat Enterprise Linux 100:24.1.9-4.el10_2 < *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:24.1.5-6.el10_0 < *unaffected
Red HatRed Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION0:1.1.0-25.el6_10.16 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:1.20.4-34.el7_9 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:1.8.0-36.el7_9.4 < *unaffected
Red HatRed Hat Enterprise Linux 80:21.1.3-20.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 80:1.20.11-28.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 80:1.15.0-9.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:1.20.10-4.el8_4 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:1.11.0-8.el8_4.15 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:1.20.10-4.el8_4 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:1.11.0-8.el8_4.15 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:21.1.3-2.el8_6.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:1.20.11-7.el8_6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:1.12.0-6.el8_6.17 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:1.12.0-6.el8_6.17 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Service0:21.1.3-2.el8_6.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Service0:1.20.11-7.el8_6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutions0:21.1.3-2.el8_6.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutions0:1.20.11-7.el8_6 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:21.1.3-13.el8_8 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:1.20.11-18.el8_8 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:1.12.0-15.el8_8.17 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:21.1.3-13.el8_8 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:1.20.11-18.el8_8 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:1.12.0-15.el8_8.17 < *unaffected
Red HatRed Hat Enterprise Linux 90:1.15.0-6.el9_7.1 < *unaffected
Red HatRed Hat Enterprise Linux 90:23.2.7-6.el9_7 < *unaffected
Red HatRed Hat Enterprise Linux 90:1.20.11-33.el9_7 < *unaffected
Red HatRed Hat Enterprise Linux 90:1.15.0-7.el9_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 90:1.20.11-34.el9_8 < *unaffected
Red HatRed Hat Enterprise Linux 90:24.1.9-4.el9_8 < *unaffected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutions0:21.1.3-5.el9_0 < *unaffected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutions0:1.20.11-13.el9_0 < *unaffected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutions0:1.11.0-22.el9_0.17 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:21.1.3-10.el9_2 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:1.20.11-20.el9_2 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:1.12.0-14.el9_2.14 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Support0:1.20.11-28.el9_4 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Support0:22.1.9-8.el9_4 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Support0:1.13.1-8.el9_4.9 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:1.20.11-33.el9_6 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:23.2.7-6.el9_6 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:1.14.1-10.el9_6 < *unaffected

Weaknesses

  • CWE-125: Out-of-bounds Read

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access

Additional References

References