Buffer overflow in Red Hat Enterprise Linux 10
CVE-2026-115455
A flaw was found in GCC libstdc++. When an application extracts data into a bitset from a wide-character stream, internal stack memory allocation fails to properly account for character size and alignment. An attacker capable of supplying crafted input to an affected application could trigger a stack-based buffer overflow leading denial of service (DoS).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.003 (23.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-115455 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- gcc.gnu.org/cgit/gcc/commit/
Frequently asked questions
- What is CVE-2026-115455?
- CVE-2026-115455 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-10-30.
- How severe is CVE-2026-115455?
- Medium severity. CVSS v3 base score is 6.5 out of 10.