RHSA-2026:49671
Vulnerability from csaf_redhat - Published: 2026-08-03 13:40 - Updated: 2026-09-21 12:04Summary
Red Hat Security Advisory: libtiff security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for libtiff is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The libtiff packages contain a library of functions for manipulating Tagged Image File Format (TIFF) files.
Security Fix(es):
* libtiff: TIFFRasterScanlineSize64 produce too-big size and could cause OOM (CVE-2023-52355)
* libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image (CVE-2026-12912)
Bug Fix(es) and Enhancement(s):
* Reintroduce the `tiffcp -i` option [rhel-10.0.z] (JIRA:RHEL-185417)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
An out-of-memory flaw was found in libtiff that could be triggered by passing a crafted tiff file to the TIFFRasterScanlineSize64() API. This flaw allows a remote attacker to cause a denial of service via a crafted input with a size smaller than 379 KB.
7.5 (High)
Affected products
Fixed
37 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-0:4.6.0-6.el10_0.4.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-devel-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-devel-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-devel-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-devel-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debuginfo-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-debugsource-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: CRB-10.0.Z.E2S:libtiff-tools-debuginfo-0:4.6.0-6.el10_0.4.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
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).
7.3 (High)
Affected products
Fixed
37 products, the same list as for
CVE-2023-52355
Threats
Impact
Important
References
16 references
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-12912"
},
{
"category": "external",
"summary": "RHBZ#2492871",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492871"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-12912",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-12912"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-12912",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12912"
},
{
"category": "external",
"summary": "https://gitlab.com/libtiff/libtiff/-/merge_requests/873",
"url": "https://gitlab.com/libtiff/libtiff/-/merge_requests/873"
},
{
"category": "external",
"summary": "https://gitlab.com/libtiff/libtiff/-/work_items/824",
"url": "https://gitlab.com/libtiff/libtiff/-/work_items/824"
}
],
"release_date": "2026-04-16T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-03T13:40:08+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:49671"
},
{
"category": "workaround",
"details": "To mitigate this issue, applications processing untrusted TIFF images should avoid explicitly configuring `PIXARLOGDATAFMT_8BITABGR` when decoding PixarLog-compressed TIFF images with three samples per pixel. This specific combination of output format and samples per pixel is required to trigger the heap-based buffer overflow.",
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"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image"
}
]
}
Loading…
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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