RHSA-2026:1714
Vulnerability from csaf_redhat - Published: 2026-02-02 13:03 - Updated: 2026-02-02 15:25Summary
Red Hat Security Advisory: wireshark security update
Notes
Topic
An update for wireshark is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Moderate. 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 wireshark packages contain a network protocol analyzer used to capture and browse the traffic running on a computer network.
Security Fix(es):
* Wireshark: NULL Pointer Dereference in Wireshark (CVE-2025-9817)
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.
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"text": "A flaw was found in Wireshark\u2019s SSH dissector, caused by a missing NULL check in key exchange parameter handling. This vulnerability can trigger a segmentation fault when processing malformed SSH traffic or crafted capture files, potentially causing the application to crash and resulting in a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "Wireshark: NULL Pointer Dereference in Wireshark",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is considered Moderate rather than an Important flaw because its impact is limited to application availability and does not allow arbitrary code execution or information disclosure. The vulnerability leads to a segmentation fault in the SSH dissector, which can crash Wireshark or TShark, but only when the user opens a malicious capture file or analyzes traffic containing malformed SSH packets. Since exploitation requires user interaction (opening the file) or the ability to inject traffic into a monitored network, and the consequence is restricted to denial of service rather than compromising confidentiality or integrity, the severity is classified as Moderate.",
"title": "Statement"
},
{
"category": "general",
"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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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-9817"
},
{
"category": "external",
"summary": "RHBZ#2392839",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2392839"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-9817",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-9817"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-9817",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9817"
},
{
"category": "external",
"summary": "https://gitlab.com/wireshark/wireshark/-/issues/20642",
"url": "https://gitlab.com/wireshark/wireshark/-/issues/20642"
},
{
"category": "external",
"summary": "https://www.wireshark.org/security/wnpa-sec-2025-03.html",
"url": "https://www.wireshark.org/security/wnpa-sec-2025-03.html"
}
],
"release_date": "2025-09-03T07:38:58.940000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-02-02T13:03:43+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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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "Wireshark: NULL Pointer Dereference in Wireshark"
}
]
}
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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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