CVE catalog
CVE-2026-43618
Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigge
- Severity
- High · CVSS 8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.78% · Oct 27, 2026
Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rsync | sid | 3.5.1+ds1-2 | fixed |
| Debian | rsync | forky | 3.5.1+ds1-2 | fixed |
| Debian | rsync | trixie | 3.4.1+ds1-5+deb13u4 | fixed |
| Debian | rsync | trixie-security | 3.5.0+ds1-0+deb13u1 | fixed |
| Debian | rsync | bookworm | 3.2.7-1+deb12u6 | fixed |
| Debian | rsync | bookworm-security | 3.2.7-1+deb12u5 | fixed |
| Cpe | rsync | Not reported | 3.2.7-1ubuntu1.4 | fixed |
| Cpe | rsync | Not reported | Not reported | unknown |
| Cpe | rsync | Not reported | 3.2.7-1+deb12u5 | fixed |
| Cpe | rsync | Not reported | Not reported | unknown |
| Alpine | rsync | 3.20 | 3.4.3-r0 | fixed |
| Alpine | rsync | 3.21 | 3.4.3-r0 | fixed |
| Alpine | rsync | 3.22 | 3.4.3-r0 | fixed |
| Alpine | rsync | 3.23 | 3.4.3-r0 | fixed |
| Alpine | rsync | 3.24 | 3.4.3-r0 | fixed |
| Ubuntu | rsync | pro | 3.1.3-6 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.1 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.2 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.3 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.4 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.5 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.7 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.8 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.9 | vulnerable |
| Ubuntu | rsync | pro | 3.1.3-8ubuntu0.9+esm1 | fixed |
| Ubuntu | rsync | 22.04 | 3.2.3-4ubuntu1 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.3-4ubuntu2 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.3-8ubuntu1 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.3-8ubuntu2 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.3-8ubuntu3 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.3-8ubuntu3.1 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.7-0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.7-0ubuntu0.22.04.3 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.7-0ubuntu0.22.04.4 | vulnerable |
| Ubuntu | rsync | 22.04 | 3.2.7-0ubuntu0.22.04.6 | fixed |
| Ubuntu | rsync | 24.04 | 3.2.7-1 | vulnerable |
| Ubuntu | rsync | 24.04 | 3.2.7-1build1 | vulnerable |
| Ubuntu | rsync | 24.04 | 3.2.7-1build2 | vulnerable |
| Ubuntu | rsync | 24.04 | 3.2.7-1ubuntu1 | vulnerable |
| Ubuntu | rsync | 24.04 | 3.2.7-1ubuntu1.1 | vulnerable |
| Ubuntu | rsync | 24.04 | 3.2.7-1ubuntu1.2 | vulnerable |
| Ubuntu | rsync | 24.04 | 3.2.7-1ubuntu1.4 | fixed |
| Ubuntu | rsync | 25.10 | 3.4.1+ds1-3 | vulnerable |
| Ubuntu | rsync | 25.10 | 3.4.1+ds1-4 | vulnerable |
| Ubuntu | rsync | 25.10 | 3.4.1+ds1-5 | vulnerable |
| Ubuntu | rsync | 25.10 | 3.4.1+ds1-5ubuntu1 | vulnerable |
| Ubuntu | rsync | 25.10 | 3.4.1+ds1-5ubuntu1.2 | fixed |
| Ubuntu | rsync | 26.04 | 3.4.1+ds1-5ubuntu1 | vulnerable |
| Ubuntu | rsync | 26.04 | 3.4.1+ds1-6 | vulnerable |
| Ubuntu | rsync | 26.04 | 3.4.1+ds1-7 | vulnerable |
| Ubuntu | rsync | 26.04 | 3.4.1+ds1-7ubuntu0.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rsync | source | sid | 3.4.3+ds1-1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | forky | 3.4.3+ds1-1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | trixie | 3.4.1+ds1-5+deb13u3 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | bookworm | 3.2.7-1+deb12u5 | not yet assigned | Not reported | Not reported |
| Cpe | rsync | cpe | Not reported | 3.2.7-1ubuntu1.4 | Not reported | Not reported | Not reported |
| Cpe | rsync | cpe | Not reported | 3.2.7-1+deb12u5 | Not reported | Not reported | Not reported |
| Alpine | rsync | apk | 3.20 | 3.4.3-r0 | Not reported | ALPINE-CVE-2026-43618 | Not reported |
| Alpine | rsync | apk | 3.21 | 3.4.3-r0 | Not reported | ALPINE-CVE-2026-43618 | Not reported |
| Alpine | rsync | apk | 3.22 | 3.4.3-r0 | Not reported | ALPINE-CVE-2026-43618 | Not reported |
| Alpine | rsync | apk | 3.23 | 3.4.3-r0 | Not reported | ALPINE-CVE-2026-43618 | Not reported |
| Alpine | rsync | apk | 3.24 | 3.4.3-r0 | Not reported | ALPINE-CVE-2026-43618 | Not reported |
| Ubuntu | rsync | deb | pro | 3.1.3-8ubuntu0.9+esm1 | Not reported | UBUNTU-CVE-2026-43618 | Not reported |
| Ubuntu | rsync | deb | 22.04 | 3.2.7-0ubuntu0.22.04.6 | Not reported | UBUNTU-CVE-2026-43618 | Not reported |
| Ubuntu | rsync | deb | 24.04 | 3.2.7-1ubuntu1.4 | Not reported | UBUNTU-CVE-2026-43618 | Not reported |
| Ubuntu | rsync | deb | 25.10 | 3.4.1+ds1-5ubuntu1.2 | Not reported | UBUNTU-CVE-2026-43618 | Not reported |
| Ubuntu | rsync | deb | 26.04 | 3.4.1+ds1-7ubuntu0.2 | Not reported | UBUNTU-CVE-2026-43618 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [rsync]Fixed
Details (4)
3.2.7-1+deb12u6· amd64 · bookwormFixed · Fixed:
3.2.7-1+deb12u5nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u6· arm64 · bookwormFixed · Fixed:
3.2.7-1+deb12u5nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u5· amd64 · bookworm-securityFixed · Fixed:
3.2.7-1+deb12u5nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u5· arm64 · bookworm-securityFixed · Fixed:
3.2.7-1+deb12u5nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
[Debian 13 (Trixie)]
- [rsync]Fixed
Details (5)
3.4.1+ds1-5+deb13u4· amd64 · trixieFixed · Fixed:
3.4.1+ds1-5+deb13u3nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u4· arm64 · trixieFixed · Fixed:
3.4.1+ds1-5+deb13u3nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
3.4.1+ds1-5+deb13u3nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u3· arm64 · trixie-securityFixed · Fixed:
3.4.1+ds1-5+deb13u3nvd · rsync · debian · 13
3.5.0+ds1-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
3.4.1+ds1-5+deb13u3nvd · rsync · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:29197]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_21726-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-43618]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-43618]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-43618]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-43618]
- [https://security-tracker.debian.org/tracker/CVE-2026-43618]
- [https://ubuntu.com/security/notices/USN-8283-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2455.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]