CVE-2026-88357 Details
Description
nDPI 5.1.0 contains a memory access issue in the DNS dissector and serializer deserialization code. Specially crafted network input can cause byte-buffer addresses at odd offsets to be cast to uint16_t or wider integer pointers and directly dereferenced without alignment checks. This results in undefined behavior and can cause process termination in UBSan-instrumented builds or on strict-alignment architectures, leading to denial of service.
A memory access vulnerability has been identified in nDPI version 5.1.0, specifically within the DNS dissector. The issue arises in the deserialization process, where specially crafted network input can lead to byte-buffer addresses at odd offsets being improperly cast to uint16_t or wider integer pointers. These pointers are then dereferenced without appropriate alignment checks, causing undefined behavior. This misalignment can result in process termination when using Undefined Behavior Sanitizer (UBSan) instrumentation, or on architectures with strict alignment requirements, creating a denial-of-service condition.
Users can update to nDPI version 5.1.1, which includes a fix for the unaligned memory access issue in the DNS dissector and the serialization code.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 24, 2026CISA-ADP
Assessed Sep 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ntop/nDPI/issues/3213 | CISA-ADP | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/ntop/nDPI/issues/3213 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/ntop/nDPI/pull/3231 | [email protected] | Issue TrackingVendor |
| https://github.com/utoni/nDPI/commit/6698f14bf6025394a537fe23f413cf79e9d13594 | [email protected] | Source CodeVendor |
| https://github.com/utoni/nDPI/commit/694231bb43ff21f452fbc2b53fcf6cdc9a99f75f | [email protected] | Source CodeVendor |
| https://github.com/utoni/nDPI/commit/6ce1280c52ed52a97332c3fe58fd2b47b867ec6e | [email protected] | Source Code |
| https://github.com/utoni/nDPI/commit/8fc3b439920021a77165f8aee4f81b25bc88629e | [email protected] | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1335 | Incorrect Bitwise Shift of Integer | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| nDPI | 5.1.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 24, 2026 | CVE Modified | CISA-ADP |
| Sep 24, 2026 | New CVE Received | [email protected] |