No exploitation reportedFix available

CVE-2026-37555

No exploitation reported by the sources we read.

Published2026-04-29
WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-04-2916:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-37555?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-37555?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Libsndfile project libsndfile

Branch	Affected	Fixed in	Source
1.2	= 1.2.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

libsndfileAlmaLinux:10all versions · fixed in 1.2.2-6.el10_2.1and 2 other packages
libsndfileAlmaLinux:9all versions · fixed in 1.0.31-9.el9_8.1and 2 other packages
libsndfileAlmaLinux:8all versions · fixed in 1.0.28-17.el8_10and 2 other packages

Vendor advisories

CVE-2026-37555 Red Hat Product Security328 products fixed · 7 known affected
libsndfile: integer overflow in ima_reader_init()
libsndfile as a component of Red Hat Enterprise Linux 6 · libsndfile-devel as a component of Red Hat Enterprise Linux 6 · libsndfile.src as a component of Red Hat Enterprise Linux 6 · +4 more
RHSA-2026:30089 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (CUDA)
RHSA-2026:30088 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (ROCm)
RHSA-2026:30087 Red Hat Product Security3 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (Spyre)
RHSA-2026:30078 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.3.5 (CUDA)
RHSA-2026:25227 Red Hat Product Security25 products fixed
Red Hat Security Advisory: libsndfile security update

9 more advisories

Full record on NVD

Fix

Vendor fix Red Hat Product Security RHSA-2026:30089 · 2 productsFor more information visit https://access.redhat.com/errata/RHSA-2026:30089
Vendor fix Red Hat Product Security RHSA-2026:30088 · 1 productFor more information visit https://access.redhat.com/errata/RHSA-2026:30088
Vendor fix Red Hat Product Security RHSA-2026:30087 · 3 productsFor more information visit https://access.redhat.com/errata/RHSA-2026:30087
Vendor fix Red Hat Product Security RHSA-2026:30078 · 2 productsFor more information visit https://access.redhat.com/errata/RHSA-2026:30078
Vendor fix Red Hat Product Security RHSA-2026:25227 · 25 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround from the vendor Red Hat Product Security RHSA-2026:30089 · 2 productsDo not process untrusted WAV files with the libsndfile library.

Advisories and patches

github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-04-29
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52026-04-29
CNACVSS 3.18.2read 2026-10-23
CISA-ADPweakness (CWE)CWE-1902026-04-29
CNAweakness (CWE)CWE-190read 2026-10-23
FIRST EPSSEPSS score0.5 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published: 2026-04-29
Last Modified: 2026-07-15
NVD status: Modified

Frequently asked questions

What is CVE-2026-37555?

Is CVE-2026-37555 actively exploited?

Active exploitation of CVE-2026-37555 has not been confirmed. Its EPSS score was 0.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-37555?

CVE-2026-37555 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

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