RHSA-2026:76781MediumCVSS 6.8

Red Hat Security Advisory: glibc security, bug fix, and enhancement update

Published
October 8, 2026
Last Modified
October 8, 2026

🔗 CVE IDs covered (4)

CVE-2026-6791 →CVE-2026-19499 →CVE-2026-19542 →CVE-2026-6368 →

📋 Description

CVE-2026-6368 — glibc: glibc: Process abort due to invalid memory in wordexp CVE-2026-6791 — glibc: Glibc: Denial of Service via stack exhaustion during tilde expansion CVE-2026-19499 — glibc: Buffer Overflow in strfmon right-justification padding CVE-2026-19542 — glibc: Fix out-of-bounds array write in tdelete

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-0:2.39-142.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-0:2.39-142.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-0:2.39-142.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-all-langpacks-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-all-langpacks-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-all-langpacks-0:2.39-142.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-all-langpacks-0:2.39-142.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-benchtests-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-0:2.39-142.el10_2.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-0:2.39-142.el10_2.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-benchtests-debuginfo-0:2.39-142.el10_2.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • glibc-common-0:2.39-142.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • glibc-common-0:2.39-142.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • +170 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Workaround: This issue is reachable only through applications that call glibc strfmon or strfmon_l with right-justified width padding into an undersized destination buffer. Prefer avoiding those APIs, or ensure destination buffers are sized for the full formatted result including padding. Where monetary formatting is exposed to untrusted input, restrict access to trusted clients. Workaround: This issue is reachable only through applications that use glibc's tsearch/tdelete APIs and allow construction of extremely deep trees (on the order of a million nodes). Restrict such services to trusted clients and enforce process memory limits so large tree growth is impractical.

🔗 References (9)