CVE-2021-3735 - Vulnerability Details - OpenCVE

A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Debian	Debian Linux
Qemu	Qemu

Configuration 1 [-]

cpe:2.3:a:qemu:qemu:6.1.0:rc4:*:*:*:*:*:*

Configuration 2 [-]

OR	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

No data.

References

Link	Providers
https://access.redhat.com/security/cve/CVE-2021-3735
https://bugzilla.redhat.com/show_bug.cgi?id=1997184
https://nvd.nist.gov/vuln/detail/CVE-2021-3735
https://security-tracker.debian.org/tracker/CVE-2021-3735
https://security.netapp.com/advisory/ntap-20250228-0009/
https://www.cve.org/CVERecord?id=CVE-2021-3735

History

Fri, 28 Feb 2025 13:45:00 +0000

Type	Values Removed	Values Added
References		https://security.netapp.com/advisory/ntap-20250228-0009/

MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2022-08-26T15:25:40.000Z

Updated: 2025-02-28T13:07:24.170Z

Reserved: 2021-08-25T00:00:00.000Z

Link: CVE-2021-3735

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-08-26T16:15:09.467

Modified: 2025-02-28T13:15:25.767

Link: CVE-2021-3735

Redhat

Severity : Low

Publid Date: 2021-08-24T00:00:00Z

Links: CVE-2021-3735 - Bugzilla

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{"acknowledgement": "Red Hat would like to thank Zhiqiang Yan (Tencent Security Yunding Lab) for reporting this issue.", "bugzilla": {"description": "QEMU: ahci: deadlock issue leads to denial of service", "id": "1997184", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1997184"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-667->CWE-400", "details": ["A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.", "A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2021-3735", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "qemu-kvm-ma", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "virt:rhel/qemu-kvm", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Fix deferred", "package_name": "virt:8.2/qemu-kvm", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Out of support scope", "package_name": "virt:8.3/qemu-kvm", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Fix deferred", "package_name": "virt:av/qemu-kvm", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "qemu-kvm", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openstack:10", "fix_state": "Out of support scope", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat OpenStack Platform 10 (Newton)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Out of support scope", "package_name": "qemu-kvm-rhev", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}], "public_date": "2021-08-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-3735\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-3735"], "statement": "This issue affects the versions of `qemu-kvm` as shipped with Red Hat Enterprise Linux 8 and Red Hat Enterprise Linux 8 Advanced Virtualization. A future update may address this flaw.", "threat_severity": "Low"}