RHSA-2026:45327
Vulnerability from csaf_redhat - Published: 2026-07-24 14:31 - Updated: 2026-08-09 11:14Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Low
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
diffutils:
* diffutils-3.12-6.1.hum1 (aarch64, x86_64)
* diffutils-3.12-6.1.hum1.src (src)
Security Fix(es):
diffutils:
* CVE-2026-53910
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 the diff3 program in the diffutils package. When processing specially crafted diff output, a heap-based buffer overflow can occur due to multiple signed integer overflows in line-mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds, resulting in a denial of service or memory corruption.
5.3 (Medium)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:diffutils-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:diffutils-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:diffutils-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Low
References
13 references
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"text": "This update includes the following RPMs:\n\ndiffutils:\n * diffutils-3.12-6.1.hum1 (aarch64, x86_64)\n * diffutils-3.12-6.1.hum1.src (src)\n\nSecurity Fix(es):\n\ndiffutils:\n * CVE-2026-53910",
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"vulnerabilities": [
{
"cve": "CVE-2026-53910",
"cwe": {
"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
},
"discovery_date": "2026-07-22T14:02:14.503146+00:00",
"ids": [
{
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"text": "2506145"
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"notes": [
{
"category": "description",
"text": "A flaw was found in the diff3 program in the diffutils package. When processing specially crafted diff output, a heap-based buffer overflow can occur due to multiple signed integer overflows in line-mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds, resulting in a denial of service or memory corruption.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "diffutils: heap\u2011based buffer overflow due to multiple signed integer overflows in line\u2011mapping calculations",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this vulnerability, an attacker needs to be able to control the output of the diff program used by diff3 (e.g., via --diff-program pointing to a malicious script) or convince a user to execute diff3 with specially crafted diff output. An attacker often needs prior execution privileges to supply the malicious diff output, meaning they already have the ability to execute arbitrary scripts on the system. Due to these reasons, this vulnerability has been rated with a low severity.",
"title": "Statement"
},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"Red Hat Hardened Images:diffutils-main@src",
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-53910"
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53910"
},
{
"category": "external",
"summary": "https://cert.pl/en/posts/2026/07/CVE-2026-53910",
"url": "https://cert.pl/en/posts/2026/07/CVE-2026-53910"
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{
"category": "external",
"summary": "https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50",
"url": "https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50"
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{
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"url": "https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=9ff04d5b84743e331e80b589335a52c5480d1815"
},
{
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],
"release_date": "2026-07-22T13:42:50.539000+00:00",
"remediations": [
{
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"date": "2026-07-24T14:31:11+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
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"Red Hat Hardened Images:diffutils-main@src",
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},
{
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"product_ids": [
"Red Hat Hardened Images:diffutils-main@aarch64",
"Red Hat Hardened Images:diffutils-main@src",
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]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"products": [
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"Red Hat Hardened Images:diffutils-main@src",
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],
"threats": [
{
"category": "impact",
"details": "Low"
}
],
"title": "diffutils: heap\u2011based buffer overflow due to multiple signed integer overflows in line\u2011mapping calculations"
}
]
}
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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.
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.
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