DEBIAN-CVE-2026-70455

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Source
https://security-tracker.debian.org/tracker/CVE-2026-70455
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70455.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-70455
Upstream
Published
2026-08-13T15:19:59Z
Modified
2026-09-01T16:06:58Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive's string matching on long option names. Attackers can specify --zt=N with a large value to spawn an unbounded number of Zstandard worker threads on the receiver, exhausting available thread and memory resources.

References

Affected packages

Debian:12 / rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

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
3.2.7-1+deb12u5
3.2.7-1+deb12u6
3.3.0-1
3.3.0+ds1-1
3.3.0+ds1-2
3.3.0+ds1-3
3.3.0+ds1-4
3.4.1+ds1-1
3.4.1+ds1-2
3.4.1+ds1-3
3.4.1+ds1-4~exp1
3.4.1+ds1-4~exp2
3.4.1+ds1-4
3.4.1+ds1-5~exp1
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
3.4.3+ds1-1
3.4.3+ds1-2
3.4.4+ds1-1
3.5.0+ds1-1
3.5.0+ds1-2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70455.json"

Debian:13 / rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.4.1+ds1-5
3.4.1+ds1-5+deb13u1
3.4.1+ds1-5+deb13u2
3.4.1+ds1-5+deb13u3
3.4.1+ds1-5+deb13u4
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
3.4.3+ds1-1
3.4.3+ds1-2
3.4.4+ds1-1
3.5.0+ds1-1
3.5.0+ds1-2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70455.json"

Debian:14 / rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.5.0+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
3.4.3+ds1-1
3.4.3+ds1-2
3.4.4+ds1-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70455.json"