CVE-2026-9572Public exploit

Memory consumption via unreleased zero-size sample allocation

Published May 26, 2026 · Updated May 26, 2026

Memory leak in Media_GetSample in GPAC MP4Box 2.0 through 2.4.0 allows local users to consume memory through a malformed MP4 file. During -cat processing, a zero sample size reaches gf_malloc(0), and the subsequent malformed-track path leaves the allocator-returned byte unreleased. Exploitation requires low-privileged local execution of MP4Box; the public demonstration reports a one-byte LeakSanitizer finding, not a crash.

CVSS severity3.3
Low
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Media_GetSample in GPAC MP4Box 2.0 through 2.4.0 allows local users to consume memory through a malformed MP4 file. During -cat processing, a zero sample size reaches gf_malloc(0), and the subsequent malformed-track path leaves the allocator-returned byte unreleased. Exploitation requires low-privileged local execution of MP4Box; the public demonstration reports a one-byte LeakSanitizer finding, not a crash.

The record

CVE
CVE-2026-9572
Published
May 26, 2026
Updated
May 26, 2026
Vendor
GPAC Project
Product
GPAC
Classifications
CWE-401, CWE-404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0
  2. Affected versionversion=2.1
  3. Affected versionversion=2.2
  4. Affected versionversion=2.3
  5. Affected versionversion=2.4.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GPAC Project · GPACversion=2.0; version=2.1; version=2.2; version=2.3; version=2.4.0

Published CVSS scores

3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
CWE-404Improper Resource Shutdown or Release

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

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