CVE-2026-25833: n/a
A buffer overflow vulnerability exists in the x509_inet_pton_ipv6() function of Mbed TLS versions 3.5.0 through 3.6.5. This issue was fixed in versions 3.6.6 and 4.1.0.
AI Analysis
Technical Summary
CVE-2026-25833 is a high-severity buffer overflow vulnerability (CWE-121) in the x509_inet_pton_ipv6() function of Mbed TLS versions 3.5.0 to 3.6.5. The flaw can lead to a denial of service by crashing the affected application. The vulnerability was addressed and fixed in Mbed TLS versions 3.6.6 and 4.1.0. There is no indication of exploitation in the wild, and no cloud service is involved.
Potential Impact
The vulnerability can cause a denial of service (application crash) when processing IPv6 addresses in the affected function. There is no evidence of confidentiality or integrity impact. No known active exploitation has been reported.
Mitigation Recommendations
Upgrade Mbed TLS to version 3.6.6 or later, or 4.1.0 or later, where the buffer overflow in x509_inet_pton_ipv6() is fixed. Patch status is confirmed by the vendor's versioning information. No other mitigations are indicated.
CVE-2026-25833: n/a
Description
A buffer overflow vulnerability exists in the x509_inet_pton_ipv6() function of Mbed TLS versions 3.5.0 through 3.6.5. This issue was fixed in versions 3.6.6 and 4.1.0.
CVSS v3.1
Score 7.5high
Affected software
pkg:github/armmbed/mbedtlsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-25833 is a high-severity buffer overflow vulnerability (CWE-121) in the x509_inet_pton_ipv6() function of Mbed TLS versions 3.5.0 to 3.6.5. The flaw can lead to a denial of service by crashing the affected application. The vulnerability was addressed and fixed in Mbed TLS versions 3.6.6 and 4.1.0. There is no indication of exploitation in the wild, and no cloud service is involved.
Potential Impact
The vulnerability can cause a denial of service (application crash) when processing IPv6 addresses in the affected function. There is no evidence of confidentiality or integrity impact. No known active exploitation has been reported.
Mitigation Recommendations
Upgrade Mbed TLS to version 3.6.6 or later, or 4.1.0 or later, where the buffer overflow in x509_inet_pton_ipv6() is fixed. Patch status is confirmed by the vendor's versioning information. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-02-06T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 69cd661ee6bfc5ba1de9cae3
Added to database: 04/01/2026, 18:38:22 UTC
Last enriched: 05/31/2026, 21:01:30 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 85
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