RHSA-2026:2786MediumCVSS 8.1

Red Hat Security Advisory: glibc security update

Published
February 17, 2026
Last Modified
August 17, 2026

🔗 CVE IDs covered (3)

CVE-2025-15281 →CVE-2026-0861 →CVE-2026-0915 →

📋 Description

CVE-2025-15281 — glibc: wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory CVE-2026-0861 — glibc: Integer overflow in memalign leads to heap corruption CVE-2026-0915 — glibc: glibc: Information disclosure via zero-valued network query

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-0:2.34-231.el9_7.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-231.el9_7.10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-231.el9_7.10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-231.el9_7.10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-231.el9_7.10.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-0:2.34-231.el9_7.10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-231.el9_7.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-231.el9_7.10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-231.el9_7.10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-all-langpacks-0:2.34-231.el9_7.10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-0:2.34-231.el9_7.10.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-0:2.34-231.el9_7.10.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-0:2.34-231.el9_7.10.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-0:2.34-231.el9_7.10.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • glibc-benchtests-debuginfo-0:2.34-231.el9_7.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +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 Workaround: To mitigate this issue, consider refactoring the use of the wordexp function to not use the WRDE_REUSE and WRDE_APPEND flags together. Workaround: Applications calling one of the vulnerable functions and allowing the alignment parameter to be set by user-controlled input can implement additional validations checks, ensuring the alignment value is a power of two and does not exceed a sane limit, for example the system page size or a maximum of 64KB. This prevents the excessively large value required to trigger the integer overflow. Workaround: 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.

🔗 References (6)