CVE-2022-2526

A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() 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.

Database specific

{
    "cna_assigner":  "redhat",
    "cwe_ids":  [
        "CWE-416"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/2xxx/CVE-2022-2526.json"
}

References

Affected packages

Git / github.com/systemd/systemd

Affected ranges

Type

GIT

Repo

https://github.com/systemd/systemd

Events

Introduced

1742aae2aa8cd33897250d6fcfbe10928e43eb2f

Fixed

d973d94dec349fb676fdd844f6fe2ada3538f27c

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:systemd_project:systemd:240:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "240"
        },
        {
            "last_affected":  "240"
        }
    ],
    "source":  [
        "CPE_STRING",
        "REFERENCES"
    ]
}

Type

GIT

Repo

https://github.com/systemd/systemd-stable

Events

Introduced

1742aae2aa8cd33897250d6fcfbe10928e43eb2f

Last Affected

1742aae2aa8cd33897250d6fcfbe10928e43eb2f

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:systemd_project:systemd:240:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "240"
        },
        {
            "last_affected":  "240"
        }
    ],
    "source":  "CPE_STRING"
}

Affected versions

Other

240

systemd 240

v240

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-2526.json"

vanir_signatures

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    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "208401693791038653337512553355040068330",
            "length":  4329
        },
        "id":  "CVE-2022-2526-0518585b",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c",
        "target":  {
            "file":  "src/resolve/resolved-dns-stream.c",
            "function":  "on_stream_io"
        }
    },
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        "deprecated":  false,
        "digest":  {
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        "id":  "CVE-2022-2526-3d277f7d",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c",
        "target":  {
            "file":  "src/resolve/resolved-dns-stream.c",
            "function":  "dns_stream_complete"
        }
    },
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        "deprecated":  false,
        "digest":  {
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            "threshold":  0.9
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        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c",
        "target":  {
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]

vanir_signatures_modified

"2026-08-18T16:21:44Z"