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Vulnerability · Published Apr 29, 2026 · Assigned by mitre

CVE-2026-37555

High 7.5

In plain English

A high-severity integer overflow in the libsndfile package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 56.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10libsndfile1.2.2-6.el10_2.1ALSA-2026:19560
AlmaLinux:8libsndfile1.0.28-17.el8_10ALSA-2026:19559
AlmaLinux:9libsndfile1.0.31-9.el9_8.1ALSA-2026:19610
AlmaLinux:10libsndfile-devel1.2.2-6.el10_2.1ALSA-2026:19560
AlmaLinux:8libsndfile-devel1.0.28-17.el8_10ALSA-2026:19559
AlmaLinux:9libsndfile-devel1.0.31-9.el9_8.1ALSA-2026:19610
AlmaLinux:10libsndfile-utils1.2.2-6.el10_2.1ALSA-2026:19560
AlmaLinux:8libsndfile-utils1.0.28-17.el8_10ALSA-2026:19559
AlmaLinux:9libsndfile-utils1.0.31-9.el9_8.1ALSA-2026:19610
Debian:12libsndfileno fix listedDEBIAN-CVE-2026-37555
Debian:13libsndfileno fix listedDEBIAN-CVE-2026-37555
Debian:14libsndfileno fix listedDEBIAN-CVE-2026-37555
Rocky Linux:10libsndfile0:1.2.2-6.el10_2.1RLSA-2026:19560
Rocky Linux:8libsndfile0:1.0.28-17.el8_10RLSA-2026:19559
Rocky Linux:9libsndfile0:1.0.31-9.el9_8.1RLSA-2026:19610
Ubuntu:22.04:LTSlibsndfileno fix listedUBUNTU-CVE-2026-37555
Ubuntu:24.04:LTSlibsndfileno fix listedUBUNTU-CVE-2026-37555
Ubuntu:25.10libsndfileno fix listedUBUNTU-CVE-2026-37555
Ubuntu:26.04:LTSlibsndfileno fix listedUBUNTU-CVE-2026-37555
Ubuntu:26.10libsndfileno fix listedUBUNTU-CVE-2026-37555

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References