RHSA-2026:80506
Vulnerability from csaf_redhat - Published: 2026-10-12 03:13 - Updated: 2026-10-12 14:16Summary
Red Hat Security Advisory: emacs security update
Severity
Important
Notes
Topic: An update for emacs is now available for Red Hat Enterprise Linux 8.
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: GNU Emacs is a powerful, customizable, self-documenting text editor. It provides special code editing features, a scripting language (elisp), and the capability to read e-mail and news.
Security Fix(es):
* emacs: GNU Emacs: Heap over-read leading to information disclosure via crafted image (CVE-2026-77219)
* emacs: local shell command injection through the user field in emacs tramp (CVE-2026-79992)
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.
A flaw was found in GNU Emacs. An integer overflow in the PBM/PPM/PGM image loader allows a remote attacker to leak heap memory contents. By supplying a specially crafted image with large dimensions and an elevated maximum color index, the image loader's internal calculations can wrap to a negative number, bypassing memory bounds checks. This enables the pixel reader to access and render sensitive information from heap memory.
7.1 (High)
Affected products
Fixed
39 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-debuginfo-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-debuginfo-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-debuginfo-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-common-debuginfo-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debuginfo-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debuginfo-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debuginfo-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debuginfo-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debugsource-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debugsource-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debugsource-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-debugsource-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-debuginfo-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-debuginfo-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-debuginfo-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-lucid-debuginfo-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-debuginfo-1:26.1-15.el8_10.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-debuginfo-1:26.1-15.el8_10.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-debuginfo-1:26.1-15.el8_10.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-nox-debuginfo-1:26.1-15.el8_10.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:emacs-terminal-1:26.1-15.el8_10.2.noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:emacs-1:26.1-15.el8_10.2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:emacs-filesystem-1:26.1-15.el8_10.2.noarch | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in Emacs TRAMP. A local attacker could exploit this vulnerability by processing maliciously crafted filenames. This occurs because TRAMP concatenates login arguments without proper sanitization, which are then passed to a local shell. Successful exploitation could lead to arbitrary code execution.
7.8 (High)
Affected products
Fixed
39 products, the same list as for
CVE-2026-77219
Threats
Impact
Important
References
17 references
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"category": "workaround",
"details": "Users of Emacs TRAMP should avoid processing untrusted filenames or interacting with remote systems that may contain maliciously crafted file names. This operational control reduces the risk of local shell command injection.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "emacs: emacs: Command injection via crafted filenames in TRAMP"
}
]
}
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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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