CVE-2026-12912Public exploit

Code execution via PixarLog output-size mismatch

Published Jun 29, 2026 · Updated Jun 29, 2026

Heap buffer overflow in libtiff on Red Hat Enterprise Linux allows local users to execute code via a crafted PixarLog TIFF image. The PixarLogDecode path asks horizontalAccumulate8abgr to emit four bytes per three-sample pixel, but advances and sizes the caller buffer for only three bytes. Reachability requires an application that explicitly selects PIXARLOGDATAFMT_8BITABGR, processes three-sample PixarLog data, and accepts the crafted image; standard TIFFReadRGBAImage use is not directly affected.

CVSS severity7.3
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in libtiff on Red Hat Enterprise Linux allows local users to execute code via a crafted PixarLog TIFF image. The PixarLogDecode path asks horizontalAccumulate8abgr to emit four bytes per three-sample pixel, but advances and sizes the caller buffer for only three bytes. Reachability requires an application that explicitly selects PIXARLOGDATAFMT_8BITABGR, processes three-sample PixarLog data, and accepts the crafted image; standard TIFFReadRGBAImage use is not directly affected.

The record

CVE
CVE-2026-12912
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-122, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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 privilegesauthenticated

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 Hardened ImagesAffected 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

7.3Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

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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