DEBIAN-CVE-2026-43620
Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a specially crafted file list where the first sorted entry is not the leading dot directory, followed by a transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in a deterministic SIGSEGV crash of the rsync client.
DEBIAN-CVE-2026-43620
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-2026-43620
rsync
Source reference: /affected/0/package/name
- Affected versions
- 3.2.7-1
Source reference:
/affected/0/versions3.2.7-1+deb12u1Source reference:
/affected/0/versions3.2.7-1+deb12u2Source reference:
/affected/0/versions3.2.7-1+deb12u3Source reference:
/affected/0/versions3.2.7-1+deb12u4Source reference:
/affected/0/versions - Fixed versions
- 3.2.7-1+deb12u5
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
rsync
Source reference: /affected/1/package/name
- Affected versions
- 3.4.1+ds1-5
Source reference:
/affected/1/versions3.4.1+ds1-5+deb13u1Source reference:
/affected/1/versions3.4.1+ds1-5+deb13u2Source reference:
/affected/1/versions - Fixed versions
- 3.4.1+ds1-5+deb13u3
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
rsync
Source reference: /affected/2/package/name
- Affected versions
- 3.4.1+ds1-5
Source reference:
/affected/2/versions3.4.1+ds1-6Source reference:
/affected/2/versions3.4.1+ds1-7Source reference:
/affected/2/versions3.4.1+ds1-8~exp1Source reference:
/affected/2/versions3.4.2+ds1-1Source reference:
/affected/2/versions3.4.2+ds1-2Source reference:
/affected/2/versions - Fixed versions
- 3.4.3+ds1-1
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"
},
{
"fixed": "3.2.7-1+deb12u5"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:deb/debian/rsync?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.2.7-1",
"3.2.7-1+deb12u1",
"3.2.7-1+deb12u2",
"3.2.7-1+deb12u3",
"3.2.7-1+deb12u4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.1+ds1-5+deb13u3"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:deb/debian/rsync?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.4.1+ds1-5",
"3.4.1+ds1-5+deb13u1",
"3.4.1+ds1-5+deb13u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.3+ds1-1"
}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:deb/debian/rsync?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.4.1+ds1-5",
"3.4.1+ds1-6",
"3.4.1+ds1-7",
"3.4.1+ds1-8~exp1",
"3.4.2+ds1-1",
"3.4.2+ds1-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57025 · Revision 1
- Added to Heist Feed
- Publisher date