CVE-2026-70637LightFTP 2.4 Data Race Condition via ABOR Command in ftpserv.c
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-820
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
hfiref0x LightFTP hfiref0x:lightftp (from the name) | through 2.4; through d28c5e08aa4bd128737d35cc6ee0f9630a910ed5 | CNA record |
References
- https://github.com/hfiref0x/LightFTP/issues/75technical-description, exploit
- https://www.vulncheck.com/advisories/lightftp-data-race-condition-via-abor-command-in-ftpserv-cthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.