CVE-2007-4661: The chunk_split function in string.c in PHP 5.2.3 does not properly calculate the needed buffer size due to...

Security readout for executives and security teams

This is an old PHP 5.2.3 memory-safety issue in chunk_split(). Public sources say the impact and attack path were unknown, but a heap-based buffer overflow was considered possible. Business urgency is mainly for legacy systems still running PHP 5.2.3 or unpatched distro packages. Exposure is likely limited to obsolete PHP 5.2.3 deployments or distribution packages that had not applied the later vendor fixes. Modern supported PHP branches should not be assumed affected from these sources. Prioritize this during legacy technology cleanup. It is not supported as actively exploited in the provided sources, but unsupported PHP 5.2.3 is a broader operational and security liability. Mitigation focus: Identify any systems still running PHP 5.2.3 or related legacy distro packages.; Upgrade PHP according to vendor guidance, including PHP 5.2.4 or later where applicable.; Apply relevant Ubuntu, Gentoo, SUSE, or other distribution security updates..

Prepared

Jun 29, 2026, 03:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.