CVE-2021-20181

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Source
https://cve.org/CVERecord?id=CVE-2021-20181
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20181.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-20181
Downstream
Related
Published
2021-05-13T16:15:07.653Z
Modified
2026-04-11T23:13:50.894112Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.

References

Affected packages

Git / github.com/qemu/qemu

Affected ranges

Type
GIT
Repo
https://github.com/qemu/qemu
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
553032db17440f8de011390e5a1cfddd13751b0b
Last affected
c25df57ae8f9fe1c72eee2dab37d76d904ac382e
Last affected
7c949c53e936aa3a658d84ab53bae5cadaa5d59c
Database specific 
{
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "5.2.0"
        },
        {
            "last_affected": "9.0"
        },
        {
            "last_affected": "10.0"
        }
    ],
    "cpe": [
        "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
        "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
        "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.11.0-rc0
v0.12.0-rc0
v0.13.0-rc0
v0.14.0-rc0
v0.2.0
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.5.0
v1.*
v1.0
v1.0-rc0
v1.0-rc1
v1.0-rc2
v1.0-rc3
v1.0-rc4
v1.1-rc0
v1.1-rc1
v1.1-rc2
v1.1.0
v1.1.0-rc2
v1.1.0-rc3
v1.1.0-rc4
v1.2.0
v1.2.0-rc0
v1.2.0-rc1
v1.2.0-rc2
v1.2.0-rc3
v1.3.0
v1.3.0-rc0
v1.3.0-rc1
v1.3.0-rc2
v1.4.0
v1.4.0-rc0
v1.4.0-rc1
v1.4.0-rc2
v1.5.0
v1.5.0-rc0
v1.5.0-rc1
v1.5.0-rc2
v1.5.0-rc3
v1.6.0
v1.6.0-rc0
v1.6.0-rc1
v1.6.0-rc2
v1.6.0-rc3
v1.7.0
v1.7.0-rc0
v1.7.0-rc1
v1.7.0-rc2
v10.*
v10.0.0
v10.0.0-rc0
v10.0.0-rc1
v10.0.0-rc2
v10.0.0-rc3
v10.0.0-rc4
v2.*
v2.0.0
v2.0.0-rc0
v2.0.0-rc1
v2.0.0-rc2
v2.0.0-rc3
v2.1.0
v2.1.0-rc0
v2.1.0-rc1
v2.1.0-rc2
v2.1.0-rc3
v2.1.0-rc4
v2.1.0-rc5
v2.10.0
v2.10.0-rc0
v2.10.0-rc1
v2.10.0-rc2
v2.10.0-rc3
v2.10.0-rc4
v2.11.0
v2.11.0-rc0
v2.11.0-rc1
v2.11.0-rc2
v2.11.0-rc3
v2.11.0-rc4
v2.11.0-rc5
v2.12.0
v2.12.0-rc0
v2.12.0-rc1
v2.12.0-rc2
v2.12.0-rc3
v2.12.0-rc4
v2.2.0
v2.2.0-rc0
v2.2.0-rc1
v2.2.0-rc2
v2.2.0-rc3
v2.2.0-rc4
v2.2.0-rc5
v2.3.0
v2.3.0-rc0
v2.3.0-rc1
v2.3.0-rc2
v2.3.0-rc3
v2.3.0-rc4
v2.4.0
v2.4.0-rc0
v2.4.0-rc1
v2.4.0-rc2
v2.4.0-rc3
v2.4.0-rc4
v2.5.0
v2.5.0-rc0
v2.5.0-rc1
v2.5.0-rc2
v2.5.0-rc3
v2.5.0-rc4
v2.6.0
v2.6.0-rc0
v2.6.0-rc1
v2.6.0-rc2
v2.6.0-rc3
v2.6.0-rc4
v2.6.0-rc5
v2.7.0
v2.7.0-rc0
v2.7.0-rc1
v2.7.0-rc2
v2.7.0-rc3
v2.7.0-rc4
v2.7.0-rc5
v2.8.0
v2.8.0-rc0
v2.8.0-rc1
v2.8.0-rc2
v2.8.0-rc3
v2.8.0-rc4
v2.9.0
v2.9.0-rc0
v2.9.0-rc1
v2.9.0-rc2
v2.9.0-rc3
v2.9.0-rc4
v2.9.0-rc5
v3.*
v3.0.0
v3.0.0-rc0
v3.0.0-rc1
v3.0.0-rc2
v3.0.0-rc3
v3.0.0-rc4
v3.1.0
v3.1.0-rc0
v3.1.0-rc1
v3.1.0-rc2
v3.1.0-rc3
v3.1.0-rc4
v3.1.0-rc5
v4.*
v4.0.0
v4.0.0-rc0
v4.0.0-rc1
v4.0.0-rc2
v4.0.0-rc3
v4.0.0-rc4
v4.1.0
v4.1.0-rc0
v4.1.0-rc1
v4.1.0-rc2
v4.1.0-rc3
v4.1.0-rc4
v4.1.0-rc5
v4.2.0
v4.2.0-rc0
v4.2.0-rc1
v4.2.0-rc2
v4.2.0-rc3
v4.2.0-rc4
v4.2.0-rc5
v5.*
v5.0.0
v5.0.0-rc0
v5.0.0-rc1
v5.0.0-rc2
v5.0.0-rc3
v5.0.0-rc4
v5.1.0
v5.1.0-rc0
v5.1.0-rc1
v5.1.0-rc2
v5.1.0-rc3
v5.2.0
v5.2.0-rc0
v5.2.0-rc1
v5.2.0-rc2
v5.2.0-rc3
v5.2.0-rc4
v6.*
v6.0.0
v6.0.0-rc0
v6.0.0-rc1
v6.0.0-rc2
v6.0.0-rc3
v6.0.0-rc4
v6.0.0-rc5
v6.1.0
v6.1.0-rc0
v6.1.0-rc1
v6.1.0-rc2
v6.1.0-rc3
v6.1.0-rc4
v6.2.0
v6.2.0-rc0
v6.2.0-rc1
v6.2.0-rc3
v6.2.0-rc4
v7.*
v7.0.0
v7.0.0-rc0
v7.0.0-rc1
v7.0.0-rc2
v7.0.0-rc3
v7.0.0-rc4
v7.1.0
v7.1.0-rc0
v7.1.0-rc1
v7.1.0-rc2
v7.1.0-rc3
v7.1.0-rc4
v7.2.0
v7.2.0-rc0
v7.2.0-rc1
v7.2.0-rc2
v7.2.0-rc3
v7.2.0-rc4
v8.*
v8.0.0
v8.0.0-rc0
v8.0.0-rc1
v8.0.0-rc2
v8.0.0-rc3
v8.0.0-rc4
v8.1.0
v8.1.0-rc0
v8.1.0-rc1
v8.1.0-rc2
v8.1.0-rc3
v8.1.0-rc4
v8.2.0
v8.2.0-rc0
v8.2.0-rc1
v8.2.0-rc2
v8.2.0-rc3
v8.2.0-rc4
v9.*
v9.0.0
v9.0.0-rc0
v9.0.0-rc1
v9.0.0-rc2
v9.0.0-rc3
v9.0.0-rc4
v9.1.0
v9.1.0-rc0
v9.1.0-rc1
v9.1.0-rc2
v9.1.0-rc3
v9.1.0-rc4
v9.2.0
v9.2.0-rc0
v9.2.0-rc1
v9.2.0-rc2
v9.2.0-rc3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20181.json"