CVE catalog
CVE-2026-101276
iperf3: CVE-2026-101276
- Severity
- Critical · CVSS 9.2
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | iperf3 | sid | 3.22-0.1 | fixed |
| Debian | iperf3 | forky | 3.22-0.1 | fixed |
| Debian | iperf3 | trixie | 3.18-2+deb13u2 | vulnerable |
| Debian | iperf3 | bookworm | 3.12-1+deb12u2 | not affected |
| Debian | iperf3 | bookworm-security | 3.12-1+deb12u1 | not affected |
| Opensuse | iperf | tumbleweed | 3.22-1.1 | fixed |
| Suse | iperf | linux enterprise server 16.0 | 3.21-160000.1.1 | fixed |
| Suse | iperf | linux enterprise server for sap applications 16.0 | 3.21-160000.1.1 | fixed |
| Suse | iperf | linux micro extras 6.2 | 3.21-160000.1.1 | fixed |
| Opensuse | iperf | leap 16.0 | 3.21-160000.1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | iperf3 | source | sid | 3.22-0.1 | not yet assigned | Not reported | [1149699] |
| Debian | iperf3 | source | forky | 3.22-0.1 | not yet assigned | Not reported | [1149699] |
| Debian | iperf3 | source | trixie | (unfixed) | not yet assigned | Not reported | [1149699] |
| Debian | iperf3 | source | bookworm | Not affected | unimportant | Not reported | [1149699] |
| Opensuse | iperf | rpm | tumbleweed | 3.22-1.1 | Not reported | OPENSUSE-SU-2026:12060-1 | Not reported |
| Suse | iperf | rpm | linux enterprise server 16.0 | 3.21-160000.1.1 | Not reported | SUSE-SU-2026:24234-1 | Not reported |
| Suse | iperf | rpm | linux enterprise server for sap applications 16.0 | 3.21-160000.1.1 | Not reported | SUSE-SU-2026:24234-1 | Not reported |
| Suse | iperf | rpm | linux micro extras 6.2 | 3.21-160000.1.1 | Not reported | SUSE-SU-2026:24178-1 | Not reported |
| Opensuse | iperf | rpm | leap 16.0 | 3.21-160000.1.1 | Not reported | OPENSUSE-SU-2026:22090-1 | Not reported |
Notes
[trixie] iperf3: Minor issue
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [iperf3]Affected
Details (2)
3.18-2+deb13u2· amd64 · trixieAffected
dsa · iperf3 · debian · 13
3.18-2+deb13u2· arm64 · trixieAffected
dsa · iperf3 · debian · 13
- [libiperf0]Affected
Source package: [iperf3]
Details (2)
3.18-2+deb13u2· amd64 · trixieAffected
dsa · iperf3 · debian · 13
3.18-2+deb13u2· arm64 · trixieAffected
dsa · iperf3 · debian · 13
- [libiperf-dev]Affected
Source package: [iperf3]
Details (2)
3.18-2+deb13u2· amd64 · trixieAffected
dsa · iperf3 · debian · 13
3.18-2+deb13u2· arm64 · trixieAffected
dsa · iperf3 · debian · 13
[openSUSE Tumbleweed]
- [iperf]Affected
Source package: [iperf]
Details (1)
3.21-1.4· x86_64 · tumbleweedAffected · Fixed:
3.22-1.1dsa · iperf · opensuse · tumbleweed
- [iperf-devel]Unknown
Source package: [iperf]
Details (1)
3.21-1.4· x86_64 · tumbleweedUnknown · Fixed:
3.22-1.1Version impact unknown
dsa · iperf · opensuse · tumbleweed
- [libiperf0]Unknown
Source package: [iperf]
Details (1)
3.21-1.4· x86_64 · tumbleweedUnknown · Fixed:
3.22-1.1Version impact unknown
dsa · iperf · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [iperf3]Not affected
Details (4)
3.12-1+deb12u2· amd64 · bookwormNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u2· arm64 · bookwormNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u1· amd64 · bookworm-securityNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u1· arm64 · bookworm-securityNot affected
dsa · iperf3 · debian · bookworm
- [libiperf0]Not affected
Source package: [iperf3]
Details (4)
3.12-1+deb12u2· amd64 · bookwormNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u2· arm64 · bookwormNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u1· amd64 · bookworm-securityNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u1· arm64 · bookworm-securityNot affected
dsa · iperf3 · debian · bookworm
- [libiperf-dev]Not affected
Source package: [iperf3]
Details (4)
3.12-1+deb12u2· amd64 · bookwormNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u2· arm64 · bookwormNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u1· amd64 · bookworm-securityNot affected
dsa · iperf3 · debian · bookworm
3.12-1+deb12u1· arm64 · bookworm-securityNot affected
dsa · iperf3 · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_12060-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-101276]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-101276]
- [https://osv.dev/vulnerability/SUSE-SU-2026:24178-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:24234-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:12060-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:22090-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-101276]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]