Off-by-one error in the dwarf_to_unw_regnum function in include/dwarf_i.h in libunwind…
Priority LOW 17CWE-189Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · None
- Fix status
- Partial Red Hat: 3 fixed, 4 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
Off-by-one error in the dwarf_to_unw_regnum function in include/dwarf_i.h in libunwind 1.1 allows local users to have unspecified impact via invalid dwarf opcodes.
Why it matters now
EPSS 0.00498 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 3 advisoriesRed Hat: 3 fixed, 4 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libunwind_project:libunwind:1.1:*:*:*:*:*:*:* | 1.1 | Vulnerable | Libunwind Project |
- cpe:2.3:a:libunwind_project:libunwind:1.1:*:*:*:*:*:*:* Versions 1.1 Vulnerable ·Libunwind Project
Remediation
Red Hat 3 advisories
- RHSA-2015:1768 Released 2015-09-10 · Red Hat rating Lowlibunwind security update
- Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 libunwind-1.1-4.1.el6ost
- RHSA-2015:1769 Released 2015-09-10 · Red Hat rating Lowlibunwind security update
- Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 libunwind-1.1-4.1.el7ost, libunwind-devel-1.1-4.1.el7ost
- RHSA-2015:1675 Released 2015-08-24 · Red Hat rating Lowlibunwind security update
- Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 libunwind-1.1-4.1.el7ost
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ceph Storage 1.1 | Affected | No fix planned: Will not fix |
| Red Hat Ceph Storage 1.2 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer | Affected | No fix planned: Will not fix |
| Red Hat Software Collections | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 | Fixed | RHSA-2015:1768 |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 | Fixed | RHSA-2015:1769 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | Fixed | RHSA-2015:1675 |
Not affected: 3 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
Timeline
- 2026-10-02 Threatist record created from CVE-2015-3239
- 2026-10-03 Alias added: GHSA-5mwh-64pf-674p
References
Sources
- CVE-2015-3239 · CVE Program
- CVE-2015-3239 · NVD
- FIRST EPSS
- GHSA-5mwh-64pf-674p · GitHub Advisory Database · CC BY 4.0
- CVE-2015-3239 · 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