Home/CVE/A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and incl
CVE

CVE-2021-3416

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and incl

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.

MEDIUM · CVSS 6 EPSS 6e-05
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
▤

Affected Products & Versions

4
qemu<= 5.2.0
fedoraproject fedoraall versions
redhat enterprise linuxall versions
debian linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPotentially Suspicious Usage Of Qemu
▣

Scoring & Timeline

6
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD18 Mar 2021 · 08:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
⚑

Vendor Advisories

17
suse-csafopenSUSE-SU-2024:11287-1
rhsaRHSA-2021:3703Moderate
suse-csafSUSE-SU-2021:14774-1
suse-csafSUSE-SU-2021:14772-1
usnUSN-5010-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1932827Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20210507-0002/Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/26/1Mailing ListPatchThird Party Advisory
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