libfcgi-bin: FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (andresultant heap-based buffer overflow) via craf...
CVE-2025-23016 is fixed in 5 products on 1 platform, first by libfcgi-bin 2.4.2-2ubuntu0.1, released January 10, 2025. It is not reported as exploited. Patch Radar priority: High.
FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (andresultant heap-based buffer overflow) via crafted nameLen or valueLenvalues in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| FastCGI · opensuse-leap 15.6 | 2.4.0-150000.4.3.1 | SUSE-SU-2025:02372-1 | Jul 18, 2025 |
| FastCGI · sles 15.6 | 2.4.0-150000.4.3.1 | SUSE-SU-2025:02372-1 | Jul 18, 2025 |
| FastCGI · sles 15.7 | 2.4.0-150000.4.3.1 | SUSE-SU-2025:02372-1 | Jul 18, 2025 |
| libfcgi · Debian 11.6 (bullseye) | 2.4.2-2+deb11u1 | DLA-4329-1 | Oct 13, 2025 |
| libfcgi · Debian 12.15 (bookworm) | 2.4.2-2+deb12u1 | DEBIAN-CVE-2025-23016 | Jan 10, 2025 |
| libfcgi · Debian 13.5 (trixie) | 2.4.5-0.1 | DEBIAN-CVE-2025-23016 | Jan 10, 2025 |
| libfcgi · Debian 14 | 2.4.5-0.1 | DEBIAN-CVE-2025-23016 | Jan 10, 2025 |
| libfcgi-bin · Ubuntu 22.04.1 LTS (jammy) | 2.4.2-2ubuntu0.1 | libfcgi-bin 2.4.2-2ubuntu0.1 | Jan 10, 2025 |
| libfcgi-bin · Ubuntu 24.04.5 LTS (noble) | 2.4.2-2.1ubuntu0.24.04.1 | libfcgi-bin 2.4.2-2.1ubuntu0.24.04.1 | Jan 10, 2025 |
| libfcgi-bin · Ubuntu 24.10 (oracular) | 2.4.2-2.1ubuntu0.24.10.1 | libfcgi-bin 2.4.2-2.1ubuntu0.24.10.1 | Jan 16, 2026 |
| libfcgi-bin · Ubuntu 25.04 (plucky) | 2.4.2-2.1ubuntu0.25.04.1 | libfcgi-bin 2.4.2-2.1ubuntu0.25.04.1 | Jan 16, 2026 |
| libfcgi-bin · Ubuntu 25.10 (questing) | 2.4.5-0.1 | libfcgi-bin 2.4.5-0.1 | Jan 10, 2025 |
| libfcgi0ldbl · Ubuntu 22.04.1 LTS (jammy) | 2.4.2-2ubuntu0.1 | libfcgi0ldbl 2.4.2-2ubuntu0.1 | Jan 10, 2025 |
| libfcgi0t64 · Ubuntu 24.04.5 LTS (noble) | 2.4.2-2.1ubuntu0.24.04.1 | libfcgi0t64 2.4.2-2.1ubuntu0.24.04.1 | Jan 10, 2025 |
| libfcgi0t64 · Ubuntu 24.10 (oracular) | 2.4.2-2.1ubuntu0.24.10.1 | libfcgi0t64 2.4.2-2.1ubuntu0.24.10.1 | Jan 16, 2026 |
| libfcgi0t64 · Ubuntu 25.04 (plucky) | 2.4.2-2.1ubuntu0.25.04.1 | libfcgi0t64 2.4.2-2.1ubuntu0.25.04.1 | Jan 16, 2026 |
| libfcgi0t64 · Ubuntu 25.10 (questing) | 2.4.5-0.1 | libfcgi0t64 2.4.5-0.1 | Jan 10, 2025 |
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