Bug 2544367 (CVE-2026-101276) - CVE-2026-101276 iperf3: iperf3: heap use-after-free in server watchdog timer
Summary: CVE-2026-101276 iperf3: iperf3: heap use-after-free in server watchdog timer
Keywords:
Status: NEW
Alias: CVE-2026-101276
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-30 21:24 UTC by OSIDB Bzimport
Modified: 2026-11-12 09:57 UTC (History)
3 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-30 21:24:44 UTC 
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.
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