CVE-2026-82459
Description
A flaw was found in Apache Thrift. A remote, unauthenticated attacker could cause a Denial of Service (DoS) by sending specially crafted network traffic to an affected application. Due to an integer underflow in the 32-bit C++ THeaderTransport component, processing this malformed data triggers an out-of-bounds memory write, leading to an application crash.
Statement
This vulnerability is rated as having Important impact because an unauthenticated remote attacker can trigger a denial of service or unexpected service termination by sending malformed network traffic to applications utilizing Apache Thrift. The flaw resides in the handling of the THeaderTransport protocol within the C++ implementation, where integer underflow conditions during transport parsing can lead to memory corruption. Because services consuming Thrift often process RPC requests across network boundaries, exploitation directly affects application availability without requiring prior authentication or user interaction.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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