CVE-2026-88373

Process crash via zero-length NAL parsing

Published Sep 24, 2026 · Updated Sep 24, 2026

NULL pointer dereference in libde265 commit 4d45a6b allows attackers to crash UBSan-instrumented processes via a zero-length NAL unit. The de265_push_NAL path can leave a NAL_unit with a NULL backing buffer, and NAL_unit::set_data passes that pointer to memcpy even when the copy length is zero. Triggering the documented termination requires a UBSan-instrumented build; public evidence does not establish behavior in ordinary builds or a network delivery path.

CVSS severityUnavailable
Unscored
EPSS probability0.34%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

NULL pointer dereference in libde265 commit 4d45a6b allows attackers to crash UBSan-instrumented processes via a zero-length NAL unit. The de265_push_NAL path can leave a NAL_unit with a NULL backing buffer, and NAL_unit::set_data passes that pointer to memcpy even when the copy length is zero. Triggering the documented termination requires a UBSan-instrumented build; public evidence does not establish behavior in ordinary builds or a network delivery path.

The record

CVE
CVE-2026-88373
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started