RHSA-2026:98640 - Security Advisory

Topic

An update for gcc-toolset-16-gcc is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The gcc-toolset-16-gcc package contains the GNU Compiler Collection version 16.

Security Fix(es):

• gcc: Integer wrap in `std (CVE-2026-114691)
• gcc: Confirmed out-of-bounds read/write in libstdc++ parallel `std (CVE-2026-114690)
• gcc: Stack overflow in std::bitset on libstdc++ (CVE-2026-115455)
• gcc: Out-of-bounds read in std::from_chars (CVE-2026-115456)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64

Fixes

• BZ - 2478508 - CVE-2026-114691 gcc: Integer wrap in `std
• BZ - 2478652 - CVE-2026-114690 gcc: Confirmed out-of-bounds read/write in libstdc++ parallel `std
• BZ - 2562933 - CVE-2026-115455 gcc: Stack overflow in std::bitset on libstdc++
• BZ - 2563044 - CVE-2026-115456 gcc: Out-of-bounds read in std::from_chars

CVEs

• CVE-2026-114690
• CVE-2026-114691
• CVE-2026-115455
• CVE-2026-115456

References

• https://access.redhat.com/security/updates/classification/#moderate