CVE-2026-70637: high-severity vulnerability in hfiref0x LightFTP
LightFTP 2.4 Data Race Condition via ABOR Command in ftpserv.c
Published · Updated
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41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.2epss 0.4%
LightFTP through 2.4 contains multiple data race vulnerabilities in ftpserv.c that allow anonymous attackers to cause undefined behavior by issuing LIST followed by ABOR commands without authentication. The control thread closes data_socket and file_fd descriptors while worker threads concurrently operate on the same fields in worker_thread_cleanup, allowing stale file descriptors to be reassigned by the OS and subsequently used by worker threads on unrelated resources, resulting in potential denial of service.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
hfiref0x · LightFTPpublic PoCs found — 1
cve_referencegithub.com/hfiref0x/LightFTP/issues/75unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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