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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-37555

35
FAUCET Score

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.

First published: Apr 29, 2026Last modified: Apr 30, 2026

Impacted Technologies

VendorProductVersion(s)CPE
1.2.2CPE matchmatch criteria
cpe:2.3:a:libsndfile_project:libsndfile:1.2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
40.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 18th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: azl3 libsndfile 1.2.2-4 on Azure Linux 3.0Fixed in: 1.2.2-5

Vendor Advisories (1)

microsoft2026-Apr/CVE-2026-37555Important

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.

Apr 14, 2026

References

access.redhat.com / errata/RHSA-2026:19559
access.redhat.com / errata/RHSA-2026:19560
access.redhat.com / errata/RHSA-2026:19610
access.redhat.com / errata/RHSA-2026:23221
access.redhat.com / errata/RHSA-2026:23222
access.redhat.com / errata/RHSA-2026:23223
access.redhat.com / errata/RHSA-2026:25092
access.redhat.com / errata/RHSA-2026:25197
access.redhat.com / errata/RHSA-2026:25198
access.redhat.com / errata/RHSA-2026:25227
access.redhat.com / errata/RHSA-2026:30078
access.redhat.com / errata/RHSA-2026:30087
access.redhat.com / errata/RHSA-2026:30088
access.redhat.com / errata/RHSA-2026:30089
access.redhat.com / security/cve/CVE-2026-37555
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-37555.json
gist.github.com / sgInnora/a5f5c19e4bf6f4fb74fab7b0ef2bfcc1
ExploitThird Party Advisory
github.com / libsndfile/libsndfile/commit/9a829113c88a51e57c1e46473e90609e4b7df151
Patch
github.com / libsndfile/libsndfile/issues/833
Issue Tracking