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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-70453

rsync < 3.5.0 Algorithmic Complexity DoS via hash_search()

Description

rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

RsyncProject rsync

Default version status: unaffected

  • 0 to ≤ 3.4.4affected
  • 3.5.0unaffected
pkg:github/RsyncProject/rsync

References