CVSS 3.1
4.2 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:LCVE-2026-125709 red hat: Out-of-bounds Write
Medium (4.2) in red hat. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
A flaw was found in libstdc++. When a byte-by-byte write operation fails during file stream processing, the library may still append data into the internal memory buffer. An attacker capable of inducing repeated write failures in an affected service can trigger a buffer overflow, potentially resulting in a Denial of Service (DoS) or memory corruption.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 11th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: partial, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-787 Out-of-bounds Write
- Published
- Modified
- Assigned by
- redhat (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- red hat:red hat enterprise linux 10
- red hat:red hat enterprise linux 6
- red hat:red hat enterprise linux 7
- red hat:red hat enterprise linux 8
- red hat:red hat enterprise linux 9
- red hat:red hat hardened images
- red hat:red hat openshift container platform 4
- red hat:red hat openshift container platform 5
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Ubuntu | 14.04:LTS | gcc-3.3, gcc-4.7, gcc-4.8 and 3 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | 16.04:LTS | gcc-3.3, gcc-4.7, gcc-4.8 and 20 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | 18.04:LTS | gcc-5, gcc-6, gcc-7 and 19 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | 20.04:LTS | gcc-7, gcc-8, gcc-3.3 and 17 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | 22.04:LTS | gcc-9, gcc-10, gcc-11 and 23 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | 24.04:LTS | gcc-9, gcc-10, gcc-11 and 25 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | 26.04:LTS, 26.10 | gcc-11, gcc-12, gcc-13 and 14 more | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | Pro:16.04:LTS | gcc-5, gccgo-6 | no fix listed | UBUNTU-CVE-2026-125709 |
| Ubuntu | Pro:20.04:LTS | gcc-9, gcc-10, gcc-9-cross | no fix listed | UBUNTU-CVE-2026-125709 |
| Azure Linux | 3 | gcc | no fix listed | AZL-113408 |
From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Microsoft's Azure Linux vulnerability data, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu.