CVE-2026-53792
rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic that allows a malicious receiver to trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a length of zero. Attackers can send a specially crafted checksum set containing a zero-length block to cause a negative offset calculation during delta computation, resulting in an out-of-bounds read of file data buffer memory on the sender side.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.1
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.31%
- CWE
- CWE-129, CWE-787
- Published
- 2026-08-13
- Last modified
- 2026-08-14
Affected products
- RsyncProject rsync
- RsyncProject rsync
Weakness type
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