Rsync security vulnerabilities

Rsync is a fast and versatile file copying tool developed by RsyncProject. It is used for both remote and local files. Rsync versions 3.4.2 and earlier have security vulnerabilities. These vulnerabilities stem from an authorization bypass in the access control list based on hostnames during chroo...

CVE-2026-43619

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module...

Rsync buffer error vulnerability

Rsync is a fast and versatile file copying tool developed by RsyncProject. It is used for both remote and local files. Versions of Rsync 3.4.2 and earlier have a buffer error vulnerability. This vulnerability stems from an array out-of-bounds read in the recvfiles function in receiver.c. A...

PT-2026-42052

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.4.3 Description An integer overflow exists in the compressed-token decoder due to a 32-bit signed counter that is not checked for overflow. A malicious sender can trigger this overflow, causing the receiver process to...

PT-2026-42055

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.4.3 Description An off-by-one out-of-bounds stack write exists in the establish proxy connection function within socket.c. Network attackers can corrupt stack memory by sending a malformed HTTP proxy response. This...

CVE-2026-43618: Integer Overflow or Wraparound

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...

Rsync buffer error vulnerability

Rsync is a fast and versatile file copying tool developed by RsyncProject. It is used for both remote and local files. Versions of Rsync 3.4.2 and earlier have a buffer error vulnerability. This vulnerability stems from a 32-bit signed counter in the compression token decoder that does not check...

Rsync post-link vulnerability

Rsync is a fast and versatile file copying tool developed by RsyncProject. It is used for both remote and local files. Versions of Rsync 3.4.2 and earlier have a post-release vulnerability due to a symbolic link race condition in the path system call. Local attackers can redirect operations to...

Linux Distros Unpatched Vulnerability : CVE-2026-43620

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Debian dla-4591 : rsync - security update

The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4591 advisory. - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4591-1 [email protected]...

CVE-2026-45232: Off-by-one Error

Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establishproxyconnection function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves...

UBUNTU-CVE-2026-43620

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...

PT-2026-42153

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.4.3 Description A time-of-check to time-of-use TOCTOU race condition exists in the daemon file handling. This occurs when an rsync daemon is configured with the chroot setting set to false. A local attacker with write...

CVE-2026-43617: Authentication Bypass by Alternate Name

Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing...

Linux Distros Unpatched Vulnerability : CVE-2026-45232

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establishproxyconnection function in socket.c that allows netwo...

Fedora 43 : rsync (2026-d4d8ae2bdc)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-d4d8ae2bdc advisory. Fixing various bugs from Upstream. I did not do a rebase since the Upstream stopped supporting the rsync-patches repo. I accepted this change in Rawhide but ...

UBUNTU-CVE-2026-43617

Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing...

RHEL 9 : rsync (RHSA-2026:19368)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:19368 advisory. The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because...

UBUNTU-CVE-2026-43619

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module...

PT-2026-42053

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.4.3 Description A symlink race condition exists in path-based system calls, including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat. Local attackers with filesystem access can...