CVE-2026-1940

Application crash via misvalidated WAV chunk length

Published Mar 23, 2026 · Updated Mar 23, 2026

Out-of-bounds read in GStreamer WAV parsing on Red Hat Enterprise Linux 7 through 10 allows attackers to crash media applications. In gst_wavparse_adtl_chunk(), the bounds check validates lsize + 8, but the parser advances by 8 + GST_ROUND_UP_2(lsize), exceeding validated input when lsize is odd. A crafted WAV file must reach an application using the affected plugin; the bounded consequence is an application crash.

CVSS severity5.1
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in GStreamer WAV parsing on Red Hat Enterprise Linux 7 through 10 allows attackers to crash media applications. In gst_wavparse_adtl_chunk(), the bounds check validates lsize + 8, but the parser advances by 8 + GST_ROUND_UP_2(lsize), exceeding validated input when lsize is odd. A crafted WAV file must reach an application using the affected plugin; the bounded consequence is an application crash.

The record

CVE
CVE-2026-1940
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-125, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

5.1Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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