CVE-2022-2526

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-2526
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-2526.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-2526
Downstream
Related
Published
2022-09-09T15:15:10Z
Modified
2025-10-21T07:00:03.650085Z
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

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
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004
005
006
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010
011
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020
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051
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055
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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
v191
v192
v193
v194
v195
v196
v197
v198
v199
v2
v20
v200
v201
v202
v203
v204
v205
v206
v207
v208
v209
v21
v210
v211
v212
v213
v214
v215
v216
v217
v218
v219
v22
v220
v221
v222
v223
v224
v225
v226
v227
v228
v229
v23
v230
v231
v232
v233
v234
v235
v236
v237
v238
v239
v24
v25
v26
v27
v28
v29
v3
v30
v31
v32
v33
v34
v35
v36
v37
v38
v39
v4
v40
v41
v42
v43
v44
v5
v6
v7
v8
v9

Database specific

vanir_signatures

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