CVE-2026-70457 (GCVE-0-2026-70457)

Vulnerability from cvelistv5 – Published: 2026-08-13 14:44 – Updated: 2026-08-14 16:51
VLAI
Title
rsync 3.2.3 < 3.5.0 Out-of-Bounds Write via parse_size_arg()
Summary
rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:32 UTC
CWE
  • CWE-131 - Incorrect Calculation of Buffer Size
  • CWE-787 - Out-of-bounds Write
Assigner
References
Impacted products
Vendor Product Version
RsyncProject rsync Affected: 3.2.3 , ≤ 3.4.4 (semver)
Unaffected: 3.5.0 (semver)
Create a notification for this product.
Date Public
2026-08-12 00:00
Credits
gregkh
Show details on NVD website
To clipboard 

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