DROLSKY List::SomeUtils::XS up to 0.58 on Perl pairwise out-of-bounds write

Summaryinfo

A vulnerability was found in DROLSKY List::SomeUtils::XS up to 0.58 on Perl and classified as critical. The impacted element is the function pairwise. Executing a manipulation can lead to out-of-bounds write. This vulnerability is registered as CVE-2026-12844. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in DROLSKY List::SomeUtils::XS up to 0.58 on Perl. It has been declared as critical. This vulnerability affects the function pairwise. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-12844 since 06/21/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 323821 (Linux Distros Unpatched Vulnerability : CVE-2026-12844), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.59 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (323821). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• DROLSKY

Name

• List::SomeUtils::XS

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56
• 0.57
• 0.58

CPE 2.3info

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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