CVE-2022-2526

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-2526
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-2526.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-2526
Downstream
Related
Published
2022-09-09T15:15:10Z
Modified
2025-09-16T07:23:22.405475Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

A use-after-free vulnerability was found in systemd. This issue occurs due to the onstreamio() function and dnsstreamcomplete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.

References

Affected packages

Debian:11 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
240-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
240-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
240-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
240-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Git / github.com/systemd/systemd

Affected ranges

Type
GIT
Repo
https://github.com/systemd/systemd
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
d973d94dec349fb676fdd844f6fe2ada3538f27c

Affected versions

Other

001
002
003
004
005
006
007
008
009
010
011
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014
015
016
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019
020
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053
054
055
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057
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059
060
061
062
064
174
175
176
177
178
179
180
181
182
v1
v10
v11
v12
v13
v14
v15
v16
v17
v18
v183
v184
v185
v186
v187
v188
v189
v19
v190
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v192
v193
v194
v195
v196
v197
v198
v199
v2
v20
v200
v201
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v205
v206
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v208
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v21
v210
v211
v212
v213
v214
v215
v216
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v22
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v224
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v24
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v26
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v3
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v4
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v44
v5
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v7
v8
v9

Database specific 

{
    "vanir_signatures": [
        {
            "signature_type": "Function",
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c",
            "id": "CVE-2022-2526-0518585b",
            "digest": {
                "function_hash": "208401693791038653337512553355040068330",
                "length": 4329.0
            },
            "target": {
                "function": "on_stream_io",
                "file": "src/resolve/resolved-dns-stream.c"
            }
        },
        {
            "signature_type": "Function",
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c",
            "id": "CVE-2022-2526-3d277f7d",
            "digest": {
                "function_hash": "165753356205743956457529010201804762870",
                "length": 358.0
            },
            "target": {
                "function": "dns_stream_complete",
                "file": "src/resolve/resolved-dns-stream.c"
            }
        },
        {
            "signature_type": "Line",
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c",
            "id": "CVE-2022-2526-7591cea9",
            "digest": {
                "line_hashes": [
                    "24244502987640347669429748297519997487",
                    "305861172124080797233263628752068476767",
                    "201898119636995375130900012674839025850",
                    "243976609872396757423323106453765157402",
                    "25033070272748089651412234795692720617",
                    "4749797598595707144303836668512376180",
                    "102934075727237860555720616686638501394",
                    "89242042041014859283960974229838224291"
                ],
                "threshold": 0.9
            },
            "target": {
                "file": "src/resolve/resolved-dns-stream.c"
            }
        }
    ]
}