RHSA-2026:98640: gcc-toolset security update

RHSA-2026:98640, released November 12, 2026, fixes 4 CVEs in gcc-toolset (version 16-gcc-0:16.2.1-1.4.el10_3). None of them is reported as exploited. Patch Radar priority: Routine.

Routine

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

6.5

Base score, 0 to 10

Highest EPSS

0.0049

42nd percentile

Priority of the 4 CVEs

Patch now 0
                                Urgent 0
                                High 0
                                Routine 4

Fixed package versions

Product	Release	Fixed in
gcc-toolset	RHEL 10	16-gcc-0:16.2.1-1.4.el10_3

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2026-114691	Gcc: integer wrap in `std	5.9	0.0049	None reported
Routine	CVE-2026-115455	Gcc: stack overflow in std::bitset on libstdc++	6.5	0.0031	None reported
Routine	CVE-2026-115456	cpp: gcc: Out-of-bounds read in std::from_chars	3.7	0.0022	None reported
Routine	CVE-2026-114690	Gcc: confirmed out-of-bounds read/write in libstdc++ parallel `std	6.2	0.0012	None reported

Also fixes CVE-2026-114691

RHSA-2026:98526
gcc-toolset-15-gcc, gcc-toolset-15-gcc-c++, gcc-toolset-15-gcc-gfortran and 14 more on RHEL 9
RHSA-2026:98534
gcc-toolset-16-gcc, gcc-toolset-16-gcc-c++, gcc-toolset-16-gcc-gfortran and 19 more on RHEL 9
RHSA-2026:98648
gcc on RHEL 10
RHSA-2026:98524
cpp, gcc, gcc-c++ and 24 more on RHEL 9
RHSA-2026:98115
cpp, gcc, gcc-c++ and 25 more on RHEL 8

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:98640

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