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Vulnerability record · CVE-2021-33304 · published 15 February 2023

CVE-2021-33304: Altran picotcp double free vulnerability

Altran · Picotcp

Double Free vulnerability in virtualsquare picoTCP v1.7.0 and picoTCP-NG v2.1 in modules/pico_fragments.c in function pico_fragments_reassemble, allows attackers to execute arbitrary code.

9.8 CVSS 3.1 Critical EPSS 0.84% · top 43.9% CWE-415 · Double free
9.8CVSS 3.1 base score
0.84%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Double Free vulnerability in virtualsquare picoTCP v1.7.0 and picoTCP-NG v2.1 in modules/pico_fragments.c in function pico_fragments_reassemble, allows attackers to execute arbitrary code.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/virtualsquare/picotcp/issues/6 Issue TrackingPatchVendor Advisory
https://github.com/virtualsquare/picotcp/issues/6 Issue TrackingPatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-24338Altran picotcp out-of-bounds write vulnerabilityAn issue was discovered in picoTCP through 1.7.0. The DNS domain name record decompression functionality in pico_dns_decompress_name() in pico_dns_co…EPSS 37%9.8CVE-2017-1000210Altran picotcp memory buffer overflow vulnerabilitypicoTCP (versions 1.7.0 - 1.5.0) is vulnerable to stack buffer overflow resulting in code execution or denial of service attackEPSS 2.2%9.1CVE-2020-24341Altran picotcp out-of-bounds read vulnerabilityAn issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The TCP input data processing function in pico_tcp.c does not validate the length of…EPSS 5.0%9.1CVE-2020-17441Altran picotcp out-of-bounds read vulnerabilityAn issue was discovered in picoTCP 1.7.0. The code for processing the IPv6 headers does not validate whether the IPv6 payload length field is equal t…EPSS 7.0%7.5CVE-2023-30463Altran picotcp integer overflow vulnerabilityAltran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer overflow in pico_ipv6_alloc when proce…EPSS 0.87%7.5CVE-2020-24339Altran picotcp out-of-bounds read vulnerabilityAn issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The DNS domain name record decompression functionality in pico_dns_decompress_name()…EPSS 2.8%7.5CVE-2020-24340Altran picotcp out-of-bounds read vulnerabilityAn issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The code that processes DNS responses in pico_mdns_handle_data_as_answers_generic() …EPSS 2.9%7.5CVE-2020-17442Altran picotcp integer overflow vulnerabilityAn issue was discovered in picoTCP 1.7.0. The code for parsing the hop-by-hop IPv6 extension headers does not validate the bounds of the extension he…EPSS 3.1%

Source: NIST National Vulnerability Database (record CVE-2021-33304), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.