Executive brief
A vulnerability in a Perl library used for shared data storage allows a local attacker to crash applications or potentially read sensitive information from memory. By manipulating the data files used by the library, an attacker can cause the system to read data from incorrect locations. This could lead to service disruptions or the exposure of data belonging to other processes using the same library.
Technical details
An out-of-bounds read vulnerability exists in Data::RadixTree::Shared before version 0.02 due to insufficient validation of node records within the rdx_find_locked function. While the rdx_validate_header function checks the header and region layout against file size, it fails to validate individual node records. A local attacker with write access to the backing file can poison node records with malicious indices. When the library performs a lookup, it may dereference these unvalidated indices, leading to an out-of-bounds read of adjacent memory or a process crash. The issue is fixed in version 0.02.
Affected products
- EGOR (CPAN) Data::RadixTree::Shared < 0.02
Timeline
- 2026-07-21: disclosed
- 2026-07-21: advisory