Memory corruption in gcc
Priority LOW 32CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 fixed, 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
Heap/stack buffer overflow in the dlang_lname function in d-demangle.c in libiberty allows attackers to potentially cause a denial of service (segmentation fault and crash) via a crafted mangled symbol.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01504 74th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 3 fixed, 5 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | gcc | gcc 11.2.0 | — | No fix listed | CNA |
- gcc Vendor— Affected gcc 11.2.0 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gnu:gcc:11.2:*:*:*:*:*:*:* | 11.2 | Vulnerable | GNU |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
- cpe:2.3:a:gnu:gcc:11.2:*:*:*:*:*:*:* Versions 11.2 Vulnerable ·GNU
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
Remediation
Red Hat 2 advisories
- RHSA-2023:6372 Released 2023-11-07 · Red Hat rating Lowgdb security update
- Red Hat Enterprise Linux AppStream (v. 9) gdb-10.2-11.el9, gdb-doc-10.2-11.el9, gdb-gdbserver-10.2-11.el9 +2
- RHSA-2023:3269 Released 2023-05-23 · Red Hat rating Moderatedevtoolset-12-binutils security update
- Red Hat Software Collections for RHEL Workstation(v. 7) devtoolset-12-binutils-2.36.1-6.el7, devtoolset-12-binutils-devel-2.36.1-6.el7
- Red Hat Software Collections for RHEL(v. 7) devtoolset-12-binutils-2.36.1-6.el7, devtoolset-12-binutils-devel-2.36.1-6.el7
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | — |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6372 |
| Red Hat Software Collections for RHEL Workstation(v. 7) | Fixed | RHSA-2023:3269 |
| Red Hat Software Collections for RHEL(v. 7) | Fixed | RHSA-2023:3269 |
Not affected: 3 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Virtualization 4
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3826
- 2026-10-03 Alias added: GHSA-88rg-m78j-x8xw
- 2026-11-02 CISA SSVC decision points changed
- 2026-11-07 Affected versions changed · Red Hat
References
Sources
- CVE-2021-3826 · CVE Program
- CVE-2021-3826 · NVD
- FIRST EPSS
- GHSA-88rg-m78j-x8xw · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3826 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences