Disclosure summary
An issue was discovered in libsndfile 1.2.2 IMA ADPCM codec. The AIFF code path (line 241) was fixed with (sf_count_t) cast, but the WAV code path (line 235) and close path (line 167) were not. When samplesperblock (int) * blocks (int) exceeds INT_MAX, the 32-bit multiplication overflows before being assigned to sf.frames (sf_count_t/int64). With samplesperblock=50000 and blocks=50000, the product 2500000000 overflows to -1794967296. This causes incorrect frame count leading to heap buffer overflow or denial of service. Both values come from the WAV file header and are attacker-controlled. This issue was discovered after an incomplete fix for CVE-2022-33065.
Source-reported weakness categories
CWE-190
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Apr
Open original source · Updated Sep 24, 2026
An issue was discovered in libsndfile 1.2.2 IMA ADPCM codec. The AIFF code path (line 241) was fixed with (sf_count_t) cast, but the WAV code path (line 235) and close path (line 167) were not. When samplesperblock (int) * blocks (int) exceeds INT_MAX, the 32-bit multiplication overflows before being assigned to sf.frames (sf_count_t/int64). With samplesperblock=50000 and blocks=50000, the product 2500000000 overflows to -1794967296. This causes incorrect frame count leading to heap buffer overflow or denial of service. Both values come from the WAV file header and are attacker-controlled. This issue was discovered after an incomplete fix for CVE-2022-33065.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.5
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | cbl2 libsndfile 1.0.31-4 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 libsndfile 1.0.31-4 on CBL-Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 libsndfile 1.2.2-4 on Azure Linux 3.0 | (MSRC status code 3) |
Vendor remediation references
- Release Notes · product IDs 20369-21692
- Vendor guidance · product IDs 20369-21692
- CBL-Mariner Releases · build 1.2.2-5 · product IDs 20887-17084
- Vendor guidance · product IDs 20887-17084
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-05-02T21:01:33-04:00
MODIFIED 2026-09-24T22:40:09-04:00
INGESTED 2026-10-08T12:45:03-04:00