CVE-2026-12844

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Source
https://cve.org/CVERecord?id=CVE-2026-12844
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12844.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-12844
Downstream
Related
Published
2026-06-25T15:26:09.331Z
Modified
2026-08-07T11:48:51.689819541Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function
Details

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.

Database specific 
{
    "cna_assigner": "CPANSec",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12844.json",
    "cwe_ids": [
        "CWE-122",
        "CWE-787"
    ]
}
References

Affected packages

Git / github.com/houseabsolute/list-someutils-xs

Affected ranges

Type
GIT
Repo
https://github.com/houseabsolute/list-someutils-xs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7d2178e865a5d43d16c5a1625ad83a5919ab3dc9
Fixed
22549f78669b780d6aa338a2d2e49a3dedfffaa6
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.59"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.50
v0.51
v0.52
v0.53
v0.54
v0.55
v0.56
v0.57
v0.58

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12844.json"