DEBIAN-CVE-2026-57432
Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds. A template derived from untrusted input can read heap memory past the buffer and return it to the caller.
DEBIAN-CVE-2026-57432
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-2026-57432
perl
Source reference: /affected/0/package/name
- Affected versions
- 5.36.0-7
Source reference:
/affected/0/versions5.36.0-7+deb12u1Source reference:
/affected/0/versions5.36.0-7+deb12u2Source reference:
/affected/0/versions5.36.0-7+deb12u3Source reference:
/affected/0/versions - Fixed versions
- 5.36.0-7+deb12u4
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
perl
Source reference: /affected/1/package/name
- Affected versions
- 5.40.1-6
Source reference:
/affected/1/versions - Fixed versions
- 5.40.1-6+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
perl
Source reference: /affected/2/package/name
- Affected versions
- 5.40.1-6
Source reference:
/affected/2/versions5.40.1-7Source reference:
/affected/2/versions - Fixed versions
- 5.40.1-8
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"
},
{
"fixed": "5.36.0-7+deb12u4"
}
]
}
],
"package": {
"name": "perl",
"purl": "pkg:deb/debian/perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.36.0-7",
"5.36.0-7+deb12u1",
"5.36.0-7+deb12u2",
"5.36.0-7+deb12u3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57432.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.40.1-6+deb13u1"
}
]
}
],
"package": {
"name": "perl",
"purl": "pkg:deb/debian/perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.40.1-6"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57432.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.40.1-8"
}
]
}
],
"package": {
"name": "perl",
"purl": "pkg:deb/debian/perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"5.40.1-6",
"5.40.1-7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57432.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]- Related CVEs
- CVE-2026-57432
Source reference:
/upstream
Publisher severity
high
Source reference: /severity/0/score
- Event
- #83717 · Revision 1
- Added to Heist Feed
- Publisher date