CVE-2026-70458
HighCVSS 8.2Summary
rsync versions 3.0.0 before 3.5.0 contain an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.
Risk Assessment
The vulnerability can lead to memory corruption, potentially enabling remote code execution or causing service crashes.
Recommendation
Update rsync to version 3.5.0 or later, which contains the fix.
Original NVD description (English source)
rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.