Wireshark: Heap-buffer-overflow in get_utf_8_string
A heap-buffer-overflow vulnerability exists in Wireshark's get_utf_8_string function, as reported by OSS-Fuzz. The issue causes a read overflow during processing of URL-encoded form data. Multiple specific Wireshark versions are affected. No CVSS score is assigned, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability is a heap-buffer-overflow read detected in Wireshark's get_utf_8_string function, triggered during the dissect_form_urlencoded routine. The flaw was identified by OSS-Fuzz and affects numerous Wireshark versions including 0.9.x, 4.1.0 through 4.7.1, and others as listed. The overflow occurs when processing UTF-8 strings in URL-encoded data, potentially leading to memory corruption. No detailed impact or exploitation techniques are provided in the source data.
Potential Impact
The heap-buffer-overflow may lead to application crashes or memory corruption when Wireshark processes malformed URL-encoded data. No evidence of active exploitation is reported. The impact is medium severity due to potential stability or security risks inherent in memory corruption vulnerabilities.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or fix links are provided in the available data. Users should monitor Wireshark vendor advisories and OSS-Fuzz reports for updates and apply patches once available.
Wireshark: Heap-buffer-overflow in get_utf_8_string
Description
A heap-buffer-overflow vulnerability exists in Wireshark's get_utf_8_string function, as reported by OSS-Fuzz. The issue causes a read overflow during processing of URL-encoded form data. Multiple specific Wireshark versions are affected. No CVSS score is assigned, and no known exploits are reported in the wild.
Affected software
pkg:generic/wiresharkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a heap-buffer-overflow read detected in Wireshark's get_utf_8_string function, triggered during the dissect_form_urlencoded routine. The flaw was identified by OSS-Fuzz and affects numerous Wireshark versions including 0.9.x, 4.1.0 through 4.7.1, and others as listed. The overflow occurs when processing UTF-8 strings in URL-encoded data, potentially leading to memory corruption. No detailed impact or exploitation techniques are provided in the source data.
Potential Impact
The heap-buffer-overflow may lead to application crashes or memory corruption when Wireshark processes malformed URL-encoded data. No evidence of active exploitation is reported. The impact is medium severity due to potential stability or security risks inherent in memory corruption vulnerabilities.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or fix links are provided in the available data. Users should monitor Wireshark vendor advisories and OSS-Fuzz reports for updates and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- OSV-2022-867
- Osv Schema Version
- 1.2.0
- Ecosystems
- ["OSS-Fuzz"]
Threat ID: 6a50baad68715ace43585844
Added to database: 07/10/2026, 09:26:05 UTC
Last enriched: 08/13/2026, 18:38:57 UTC
Last updated: 09/05/2026, 19:53:22 UTC
Views: 22
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