DEBIAN-CVE-2026-12844
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.
DEBIAN-CVE-2026-12844
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-12844
liblist-someutils-xs-perl
Source reference: /affected/0/package/name
- Affected versions
- 0.58-3
Source reference:
/affected/0/versions0.59-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
liblist-someutils-xs-perl
Source reference: /affected/1/package/name
- Affected versions
- 0.58-3
Source reference:
/affected/1/versions0.59-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
liblist-someutils-xs-perl
Source reference: /affected/2/package/name
- Affected versions
- 0.58-3
Source reference:
/affected/2/versions - Fixed versions
- 0.59-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "liblist-someutils-xs-perl",
"purl": "pkg:deb/debian/liblist-someutils-xs-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.58-3",
"0.59-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12844.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "liblist-someutils-xs-perl",
"purl": "pkg:deb/debian/liblist-someutils-xs-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.58-3",
"0.59-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12844.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.59-1"
}
]
}
],
"package": {
"name": "liblist-someutils-xs-perl",
"purl": "pkg:deb/debian/liblist-someutils-xs-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.58-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12844.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55499 · Revision 1
- Added to Heist Feed
- Publisher date