DEBIAN-CVE-2026-43620

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Source
https://security-tracker.debian.org/tracker/CVE-2026-43620
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-43620
Upstream
  • CVE-2026-43620
Published
2026-05-20T02:16:36.727Z
Modified
2026-05-23T05:00:14.618552942Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recvfiles() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CFINCRECURSE 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 ITEMTRANSFER, 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.

References

Affected packages

Debian:11 / rsync

Package

Name
rsync
Purl
pkg:deb/debian/rsync?arch=source&distro=bullseye

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.2.3-4+deb11u4

Affected versions

3.*
3.2.3-4
3.2.3-4+deb11u1
3.2.3-4+deb11u2
3.2.3-4+deb11u3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"

Debian:12 / rsync

Package

Name
rsync
Purl
pkg:deb/debian/rsync?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.2.7-1+deb12u5

Affected versions

3.*
3.2.7-1
3.2.7-1+deb12u1
3.2.7-1+deb12u2
3.2.7-1+deb12u3
3.2.7-1+deb12u4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"

Debian:13 / rsync

Package

Name
rsync
Purl
pkg:deb/debian/rsync?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.1+ds1-5+deb13u3

Affected versions

3.*
3.4.1+ds1-5
3.4.1+ds1-5+deb13u1
3.4.1+ds1-5+deb13u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"

Debian:14 / rsync

Package

Name
rsync
Purl
pkg:deb/debian/rsync?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.3+ds1-1

Affected versions

3.*
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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43620.json"