RHSA-2026:89891: gcc-toolset security update

RHSA-2026:89891, released September 28, 2026, fixes 1 CVE in gcc-toolset (version 15-gcc-0:15.2.1-7.1.el10_2). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

7.7

Base score, 0 to 10

Highest EPSS

0.0035

28th percentile

Fixed package versions

Product	Release	Fixed in
gcc-toolset	RHEL 10	15-gcc-0:15.2.1-7.1.el10_2

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-102010	Gcc-toolset-15-gcc: gcc: gcc-toolset-16: gcc: denial of service via use-after-free in binary heap erase_if	7.7	0.0035	None reported

Also fixes CVE-2026-102010

ELSA-2026-89830
cpp, gcc, gcc-c++ and 25 more on ol 8
SUSE-SU-2026:4913-1
cross-nvptx-gcc7, gcc7 on sles 15.6, sles 15.7
ALSA-2026:89830
cpp, gcc, gcc-c++ and 25 more on almalinux 8
RLSA-2026:89830
gcc on rocky 8
RHSA-2026:89830
cpp, gcc, gcc-c++ and 25 more on RHEL 8
ELSA-2026-89891
gcc-toolset-15-gcc, gcc-toolset-15-gcc-c++, gcc-toolset-15-gcc-gfortran and 14 more on ol 10
ELSA-2026-90915
gcc-toolset-15-gcc, gcc-toolset-15-gcc-c++, gcc-toolset-15-gcc-gfortran and 16 more on ol 8
OPENSUSE-SU-2026:22083-1
cross-aarch64-gcc13, cross-aarch64-gcc13-bootstrap, cross-amdgcn-gcc13 and 17 more on opensuse-leap 16.0

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:89891

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