Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-86991.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-86991
Upstream
Published
2026-05-20T02:16:36Z
Modified
2026-08-28T17:48:00Z
Summary
CVE-2026-43620 affecting package rsync for versions less than 3.4.3-1
Details

Rsync versionĀ 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.

References

Affected packages

Azure Linux:3 / rsync

Package

Name
rsync
Purl
pkg:rpm/azure-linux/rsync

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.4.3-1

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-86991.json"