CVE-2026-43618

Summary

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.

Affected Software

VendorProductVersion RangeStatus
RsyncProjectrsync0 < 3.4.3affected

Weaknesses

  • CWE-190: Integer Overflow or Wraparound
  • CWE-125: Out-of-bounds Read

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

rsync: rsync: Remote memory disclosure via integer overflow in compressed-token decoding

Additional References

References