6.9
Medium
CVE-2026-43620 Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| rsync 3.4 | earliest → < 3.4.3 | 3.4.3 |
Other CVEs of rsync
The 44 CVEs of rsync →
CVE-2026-119741
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8.7
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rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent…
9.1
Critical
CVE-2026-70453
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8.7
High
CVE-2026-70454
rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation…
7.6
High