CVE-2026-73522: Stack-based Buffer Overflow in COVESA Open1722
COVESA Open1722 versions up to 0.9.2 contain a stack-based buffer overflow vulnerability. This flaw arises from improper bounds checking in the avtp_to_can() function, which allows unauthenticated remote attackers to send crafted UDP datagrams with more than 15 ACF-CAN messages. Exploiting this can lead to arbitrary code execution or denial of service due to corruption of adjacent stack memory.
AI Analysis
Technical Summary
CVE-2026-73522 is a stack buffer overflow vulnerability in COVESA Open1722 through version 0.9.2. The avtp_to_can() function increments a write index without validating it against the fixed 15-slot stack array size. Because the listener accepts unauthenticated UDP datagrams matching a hardcoded stream ID transmitted in plaintext, an attacker can send more than 15 ACF-CAN messages in a single datagram, causing a buffer overflow. This memory corruption can enable arbitrary code execution or denial of service.
Potential Impact
Unauthenticated remote attackers can exploit this vulnerability to corrupt stack memory, potentially leading to arbitrary code execution or denial of service on affected systems running Open1722 versions up to 0.9.2. The vulnerability does not require prior authentication or user interaction, increasing its risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict network access to the Open1722 listener to trusted sources and monitor for anomalous UDP traffic containing excessive ACF-CAN messages.
CVE-2026-73522: Stack-based Buffer Overflow in COVESA Open1722
Description
COVESA Open1722 versions up to 0.9.2 contain a stack-based buffer overflow vulnerability. This flaw arises from improper bounds checking in the avtp_to_can() function, which allows unauthenticated remote attackers to send crafted UDP datagrams with more than 15 ACF-CAN messages. Exploiting this can lead to arbitrary code execution or denial of service due to corruption of adjacent stack memory.
CVSS v4.0
Score 8.7high
Affected software
COVESA
Open1722
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73522 is a stack buffer overflow vulnerability in COVESA Open1722 through version 0.9.2. The avtp_to_can() function increments a write index without validating it against the fixed 15-slot stack array size. Because the listener accepts unauthenticated UDP datagrams matching a hardcoded stream ID transmitted in plaintext, an attacker can send more than 15 ACF-CAN messages in a single datagram, causing a buffer overflow. This memory corruption can enable arbitrary code execution or denial of service.
Potential Impact
Unauthenticated remote attackers can exploit this vulnerability to corrupt stack memory, potentially leading to arbitrary code execution or denial of service on affected systems running Open1722 versions up to 0.9.2. The vulnerability does not require prior authentication or user interaction, increasing its risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict network access to the Open1722 listener to trusted sources and monitor for anomalous UDP traffic containing excessive ACF-CAN messages.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-12T19:29:19.866Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a834becbf8831d5394ecf87
Added to database: 08/17/2026, 17:59:08 UTC
Last enriched: 09/12/2026, 01:01:40 UTC
Last updated: 10/01/2026, 14:51:09 UTC
Views: 45
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