CVE-2026-12844
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk34th percentile — higher than 34% of all known CVEs
Summary
List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function. The issue arises from improper memory management, which can lead to memory corruption.
Risk Assessment
An attacker can exploit this vulnerability to corrupt memory, potentially leading to unpredictable application behavior or allowing the execution of malicious code.
Recommendation
It is recommended to upgrade to List::SomeUtils::XS version 0.59 or later to mitigate this vulnerability.
Original NVD description (English source)
List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function. pairwise() collects the values returned by the block into a heap buffer sized to the longer input array, then grows the buffer before each copy with a single quadrupling (alloc <<= 2) instead of a loop. A block call that returns more than four times the current allocation in one invocation outgrows that one quadrupling, and the copy writes past the end of the buffer. Any caller of pairwise() whose block returns, for a single pair, more than four times the longer input array's length writes past the buffer and corrupts the heap.