CVE-2026-43620
Description
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.
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Affected products
6- osv-coords3 versionspkg:rpm/opensuse/rsync&distro=openSUSE%20Tumbleweedpkg:rpm/suse/rsync&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/rsync&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 3.4.3-1.1+ 2 more
- (no CPE)range: < 3.4.3-1.1
- (no CPE)range: < 3.4.1-160000.4.1
- (no CPE)range: < 3.4.1-160000.4.1
Patches
Vulnerability mechanics
References
3- github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvmnvdVendor Advisory
- www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-filesnvdThird Party Advisory
- github.com/RsyncProject/rsync/releases/tag/v3.4.3nvdRelease Notes
News mentions
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