CVE-2025-49179: Red Hat Enterprise Linux 10

High severity, CVSS 7.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.

Affected products

  • Red Hat Red Hat Enterprise Linux 10: before 0:24.1.5-4.el10_0 (fixed in 0:24.1.5-4.el10_0)
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - Extension: before 0:1.1.0-25.el6_10.1 (fixed in 0:1.1.0-25.el6_10.1)
  • Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support: before 0:1.8.0-17.el7_7.1 (fixed in 0:1.8.0-17.el7_7.1)
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support: before 0:1.20.4-32.el7_9 (fixed in 0:1.20.4-32.el7_9); before 0:1.8.0-36.el7_9.2 (fixed in 0:1.8.0-36.el7_9.2)
  • Red Hat Red Hat Enterprise Linux 8: before 0:1.20.11-26.el8_10 (fixed in 0:1.20.11-26.el8_10); before 0:21.1.3-18.el8_10 (fixed in 0:21.1.3-18.el8_10); before 0:1.15.0-7.el8_10 (fixed in 0:1.15.0-7.el8_10)
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support: before 0:1.9.0-15.el8_2.14 (fixed in 0:1.9.0-15.el8_2.14); before 0:1.20.6-4.el8_2 (fixed in 0:1.20.6-4.el8_2)
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: before 0:1.20.10-2.el8_4 (fixed in 0:1.20.10-2.el8_4); before 0:1.11.0-8.el8_4.13 (fixed in 0:1.11.0-8.el8_4.13)
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: before 0:1.20.10-2.el8_4 (fixed in 0:1.20.10-2.el8_4); before 0:1.11.0-8.el8_4.13 (fixed in 0:1.11.0-8.el8_4.13)
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: before 0:1.12.0-6.el8_6.14 (fixed in 0:1.12.0-6.el8_6.14); before 0:21.1.3-2.el8_6.4 (fixed in 0:21.1.3-2.el8_6.4); before 0:1.20.11-5.el8_6.3 (fixed in 0:1.20.11-5.el8_6.3)
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: before 0:1.12.0-6.el8_6.14 (fixed in 0:1.12.0-6.el8_6.14); before 0:21.1.3-2.el8_6.4 (fixed in 0:21.1.3-2.el8_6.4)
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service: before 0:1.12.0-6.el8_6.14 (fixed in 0:1.12.0-6.el8_6.14); before 0:21.1.3-2.el8_6.4 (fixed in 0:21.1.3-2.el8_6.4); before 0:1.20.11-5.el8_6.3 (fixed in 0:1.20.11-5.el8_6.3)
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions: before 0:1.12.0-6.el8_6.14 (fixed in 0:1.12.0-6.el8_6.14); before 0:21.1.3-2.el8_6.4 (fixed in 0:21.1.3-2.el8_6.4); before 0:1.20.11-5.el8_6.3 (fixed in 0:1.20.11-5.el8_6.3)
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On: before 0:1.20.11-16.el8_8 (fixed in 0:1.20.11-16.el8_8); before 0:21.1.3-11.el8_8 (fixed in 0:21.1.3-11.el8_8)
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service: before 0:1.20.11-16.el8_8 (fixed in 0:1.20.11-16.el8_8); before 0:1.12.0-15.el8_8.14 (fixed in 0:1.12.0-15.el8_8.14); before 0:21.1.3-11.el8_8 (fixed in 0:21.1.3-11.el8_8)
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions: before 0:1.20.11-16.el8_8 (fixed in 0:1.20.11-16.el8_8); before 0:1.12.0-15.el8_8.14 (fixed in 0:1.12.0-15.el8_8.14); before 0:21.1.3-11.el8_8 (fixed in 0:21.1.3-11.el8_8)
  • Red Hat Red Hat Enterprise Linux 9: before 0:1.20.11-31.el9_6 (fixed in 0:1.20.11-31.el9_6); before 0:23.2.7-4.el9_6 (fixed in 0:23.2.7-4.el9_6); before 0:1.14.1-8.el9_6 (fixed in 0:1.14.1-8.el9_6)
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions: before 0:21.1.3-3.el9_0 (fixed in 0:21.1.3-3.el9_0); before 0:1.20.11-11.el9_0 (fixed in 0:1.20.11-11.el9_0); before 0:1.11.0-22.el9_0.15 (fixed in 0:1.11.0-22.el9_0.15)
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions: before 0:21.1.3-8.el9_2 (fixed in 0:21.1.3-8.el9_2); before 0:1.20.11-18.el9_2 (fixed in 0:1.20.11-18.el9_2); before 0:1.12.0-14.el9_2.12 (fixed in 0:1.12.0-14.el9_2.12)
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support: before 0:22.1.9-6.el9_4 (fixed in 0:22.1.9-6.el9_4); before 0:1.20.11-26.el9_4 (fixed in 0:1.20.11-26.el9_4); before 0:1.13.1-8.el9_4.7 (fixed in 0:1.13.1-8.el9_4.7)
  • X.org Xwayland: before 24.1.7 (fixed in 24.1.7)

Published 2025-06-17. Last modified 2026-06-30.