Use of uninitialized variable in libsndfile WAV parsing
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-457 and the CVSS impact.
Summary
libsndfile up to 1.2.2 contains a flaw in the function wavlike_subchunk_parse in src/wavlike.c, in the WAV parsing component, where manipulated input leads to use of an uninitialized variable (CWE-457). A remote attacker can trigger it without privileges, but user interaction is required. A public exploit has been made available, and the project has not responded to an early issue report.
Written with Claude Haiku 5.5 from the sources below · 2026-10-27
Description from the CNA
A vulnerability was found in libsndfile up to 1.2.2. This issue affects the function wavlike_subchunk_parse of the file src/wavlike.c of the component WAV Parsing. Performing a manipulation results in use of uninitialized variable. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| — | libsndfile | 1.2.0; 1.2.1; 1.2.2 | — | No fix listed | CNA |
- libsndfile Vendor— Affected 1.2.0; 1.2.1; 1.2.2 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libsndfile:libsndfile:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:libsndfile:libsndfile:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
The sources list no fixed version for libsndfile. Red Hat lists Red Hat Enterprise Linux 6 as affected with no fix planned, and lists Red Hat Enterprise Linux 7, 8, 9 and 10 and Red Hat Enterprise Linux AI (RHEL AI) 3 as affected with no fix available.
Written with Claude Haiku 5.5 from the sources below · 2026-10-27
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-13 Threatist record created from CVE-2026-109828
- 2026-10-13 Alias added: GHSA-f48f-2357-x2fh
- 2026-10-16 Affected versions changed · Red Hat
- 2026-10-16 CVSS score added · Red Hat
References
Sources
- CVE-2026-109828 · CVE Program
- CVE-2026-109828 · NVD
- FIRST EPSS
- GHSA-f48f-2357-x2fh · GitHub Advisory Database · CC BY 4.0
- CVE-2026-109828 · 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