Critical
CVE-2026-101276
iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server's per-test watchdog server_timer_proc() frees streams without cancelling/joining their worker threads, so a blocked worker dereferences a freed iperf_stream; fixed in 3.22.
Announced Source revision 1
Original source ↗CVE-2026-101276
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101276
iperf3
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "esnet",
"product": "iperf3",
"versions": [
{
"status": "affected",
"version": "3.21"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-101276
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #5649 · Revision 1
- Added to Heist Feed
- Publisher date