{"id":"CVE-2026-43620","state":"PUBLISHED","title":"Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files()","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.","publishedAt":"2026-05-20T00:47:57.086Z","updatedAt":"2026-07-14T20:01:07.518Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["RsyncProject rsync"],"affected":[{"vendor":"RsyncProject","product":"rsync","packageURL":"pkg:github/RsyncProject/rsync","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.4.3","versionType":"semver"}],"repo":"https://github.com/RsyncProject/rsync"}],"references":["https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm","https://github.com/RsyncProject/rsync/releases/tag/v3.4.3","https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43620.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43620","state":"PUBLISHED","datePublished":"2026-05-20T00:47:57.086Z","dateUpdated":"2026-07-14T20:01:07.518Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-05-01T18:22:45.639Z"},"containers":{"cna":{"title":"Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files()","descriptions":[{"lang":"en","value":"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. 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