RHSA-2026:7364
Vulnerability from csaf_redhat - Published: 2026-04-10 07:11 - Updated: 2026-04-19 19:35Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
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.
A stack overflow flaw has been discovered in Poppler. This stack overflow which leads to a SIGSEGV crash occurs via deeply nested structures within the metadata of a PDF document. This occurs in Dict::lookup, Catalog::getMetadata, and associated functions in PDFDoc, with deep recursion in the regex executor (std::__detail::_Executor).
4.0 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/
https://access.redhat.com/errata/RHSA-2026:7364
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
A use-after-free vulnerability has been identified in Poppler’s StructTreeRoot class when processing specially crafted PDF documents. An attacker could exploit this flaw by persuading a user to open a malicious PDF file, or by placing such a file on a share that is later previewed, causing the application to reference freed memory. This can lead to unexpected behavior in the context of the application handling the PDF.
6.6 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/
https://access.redhat.com/errata/RHSA-2026:7364
Workaround
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability beyond the update recommendation.
References
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"notes": [
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"text": "A stack overflow flaw has been discovered in Poppler. This stack overflow which leads to a SIGSEGV crash occurs via deeply nested structures within the metadata of a PDF document. This occurs in Dict::lookup, Catalog::getMetadata, and associated functions in PDFDoc, with deep recursion in the regex executor (std::__detail::_Executor).",
"title": "Vulnerability description"
},
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"text": "poppler: Poppler stack overflow",
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"title": "Vulnerability description"
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"text": "poppler: Use-After-Free in StructTreeRoot class",
"title": "Vulnerability summary"
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"title": "Statement"
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{
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"scores": [
{
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
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"threats": [
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"category": "impact",
"details": "Moderate"
}
],
"title": "poppler: Use-After-Free in StructTreeRoot class"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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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