CVE-2026-12844
List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function
Description
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.
INFO
Published Date :
June 25, 2026, 3:26 p.m.
Last Modified :
June 25, 2026, 3:26 p.m.
Remotely Exploit :
No
Source :
CPANSec
Affected Products
The following products are affected by CVE-2026-12844
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update List::SomeUtils::XS to version 0.59 or later.
- Review caller behavior for pairwise function usage.
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CVE-2026-12844 vulnerability anywhere in the article.