Riskcovery

CVE-2026-34001

Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption

State
Published
Severity
7.8 High
Published
Apr 23, 2026
Updated
Jul 15, 2026
Reserved
Mar 25, 2026

Read the record on cve.org

Description

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, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat-SADP

Weaknesses

  • CWE-825 Expired Pointer Dereference

Affected Products

ProductVersions
Red Hat Enterprise Linux 10Red Hat
  • 0:24.1.5-6.el10_1 and laterNot affected
Red Hat Enterprise Linux 10Red Hat
  • 0:24.1.9-4.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat
  • 0:24.1.5-6.el10_0 and laterNot affected
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONRed Hat
  • 0:1.1.0-25.el6_10.16 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
  • 0:1.20.4-34.el7_9 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
  • 0:1.8.0-36.el7_9.4 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 0:21.1.3-20.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 0:1.20.11-28.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 0:1.15.0-9.el8_10 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 0:1.20.10-4.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 0:1.11.0-8.el8_4.15 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 0:1.20.10-4.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 0:1.11.0-8.el8_4.15 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 0:21.1.3-2.el8_6.6 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 0:1.20.11-7.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 0:1.12.0-6.el8_6.17 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat
  • 0:1.12.0-6.el8_6.17 and laterNot affected
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat
  • 0:21.1.3-2.el8_6.6 and laterNot affected
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat
  • 0:1.20.11-7.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat
  • 0:21.1.3-2.el8_6.6 and laterNot affected
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat
  • 0:1.20.11-7.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 0:21.1.3-13.el8_8 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 0:1.20.11-18.el8_8 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 0:1.12.0-15.el8_8.17 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 0:21.1.3-13.el8_8 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 0:1.20.11-18.el8_8 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 0:1.12.0-15.el8_8.17 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:1.15.0-6.el9_7.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:23.2.7-6.el9_7 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:1.20.11-33.el9_7 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:1.15.0-7.el9_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:1.20.11-34.el9_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:24.1.9-4.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat
  • 0:21.1.3-5.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat
  • 0:1.20.11-13.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat
  • 0:1.11.0-22.el9_0.17 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 0:21.1.3-10.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 0:1.20.11-20.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 0:1.12.0-14.el9_2.14 and laterNot affected
Red Hat Enterprise Linux 9.4 Extended Update SupportRed Hat
  • 0:1.20.11-28.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.4 Extended Update SupportRed Hat
  • 0:22.1.9-8.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.4 Extended Update SupportRed Hat
  • 0:1.13.1-8.el9_4.9 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 0:1.20.11-33.el9_6 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 0:23.2.7-6.el9_6 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 0:1.14.1-10.el9_6 and laterNot affected
Red Hat Enterprise Linux 6Red Hat

    References

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