CVE-2026-54332: GoPacket's sFlow ExtendedGatewayFlow decoder: unbounded attacker-controlled allocation (104-byte UDP datagram -> up to 16 GiB make) -> unauthenticated remote DoS
CVE-2026-54332 is a vulnerability in GoPacket's sFlow ExtendedGatewayFlow decoder: unbounded attacker-controlled allocation (104-byte UDP datagram -> up to 16 GiB make) -> unauthenticated remote DoS, rated Moderate by Microsoft, with a CVSS 3.1 base score of 7.5 (High). An attacker can exploit it remotely over the network, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.79% probability of exploitation activity in the next 30 days, higher than 57% of all scored vulnerabilities. Microsoft released the fix on 6 August 2026, outside Patch Tuesday. It affects 2 products in 1 product family (Open Source Software).
Key facts
- CVE ID
- CVE-2026-54332
- Severity
- High CVSS 7.5
- Microsoft severity
- Moderate
- Exploited in the wild
- No
- Publicly disclosed
- No
- Weakness
- CWE-770
- EPSS
- 0.79% (percentile 57%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- July 2026 Patch Tuesday
- Product families
- Open Source Software
CVSS score and vector
Microsoft scores CVE-2026-54332 at 7.5 (temporal 7.5) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | None |
| Integrity impact | None |
| Availability impact | High |
Affected products (2)
Open Source Software
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 telegraf 1.31.0-28 on Azure Linux 3.0 | CBL-Mariner Releases | Security Update | 1.31.0-30 | No |
| azl3 telegraf 1.31.0-27 on Azure Linux 3.0 |
NIST NVD data
- NVD status
- Analyzed
- NVD CVSS
- 7.5 (HIGH)
- NVD weakness
- CWE-770
- Published to NVD
- NVD last modified
Affected configurations (CPE)
| Product | Vulnerable versions |
|---|---|
| gopacket | before 1.6.1 |
References
- https://github.com/gopacket/gopacket/commit/76119086f5936aacd7088bdf97d565501bb6c4cc (Patch)
- https://github.com/gopacket/gopacket/releases/tag/v1.6.1 (Release Notes)
- https://github.com/gopacket/gopacket/security/advisories/GHSA-g6v3-7xmc-w563 (Exploit, Third Party Advisory)
- https://github.com/gopacket/gopacket/security/advisories/GHSA-g6v3-7xmc-w563 (Exploit, Third Party Advisory)
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. | |
| 2.0 | Information published. | |
| 3.0 | Information published. | |
| 4.0 | Information published. | |
| 5.0 | Information published. |