CVE-2026-43620

Name
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
disclosure@vulncheck.com https://github.com/RsyncProject/rsync/releases/tag/v3.4.3
disclosure@vulncheck.com https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm
disclosure@vulncheck.com https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* rsync >= None <= 3.4.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
rsync edge-main 3.4.3-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
rsync edge-main 3.4.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.4.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.4.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.4.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.3.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.2.4-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.2.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.2.3-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.2.3-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.2.3-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync edge-main 3.1.2-r7 None possibly vulnerable
rsync 3.23-main 3.4.3-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
rsync 3.23-main 3.4.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.23-main 3.4.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.23-main 3.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.22-main 3.4.3-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
rsync 3.22-main 3.4.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.22-main 3.4.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.22-main 3.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.22-main 3.4.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.22-main 3.4.0-r0 None possibly vulnerable
rsync 3.22-main 3.2.4-r2 None possibly vulnerable
rsync 3.22-main 3.1.2-r7 None possibly vulnerable
rsync 3.21-main 3.4.3-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
rsync 3.21-main 3.4.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.21-main 3.4.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.21-main 3.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.21-main 3.4.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.21-main 3.3.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.21-main 3.3.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.21-main 3.2.4-r2 None possibly vulnerable
rsync 3.21-main 3.1.2-r7 None possibly vulnerable
rsync 3.20-main 3.4.3-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
rsync 3.20-main 3.4.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.20-main 3.4.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.20-main 3.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.20-main 3.4.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.20-main 3.3.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.20-main 3.2.4-r2 None possibly vulnerable
rsync 3.20-main 3.1.2-r7 None possibly vulnerable
rsync 3.19-main 3.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.19-main 3.4.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.19-main 3.2.7-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
rsync 3.19-main 3.2.4-r2 None possibly vulnerable
rsync 3.19-main 3.1.2-r7 None possibly vulnerable