Description
openrsync through 0.5.0, as used in OpenBSD through 7.8 and on other platforms, allows a client to cause a server SIGSEGV by specifying a length of zero for block data, because the relationship between p->rem and p->len is not checked.
References (2)
Core 2
Core References
Various Sources
https://github.com/openbsd/src/blob/60b9c3dff1abf933e85e3c4d96b54201ee947513/usr.bin/rsync/blocks.c#L480-L481
Issue Tracking
https://github.com/kristapsdz/openrsync/issues/34
Scores
CVSS v3
5.3
EPSS
0.0024
EPSS Percentile
15.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1284
Status
published
Products (1)
kristapsdz/openrsync
< 0.5.0
Published
Dec 15, 2025
Tracked Since
Feb 18, 2026