CVE-2026-69184

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Source
https://cve.org/CVERecord?id=CVE-2026-69184
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-69184.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-69184
Aliases
  • GHSA-pjmc-gx33-gc76
Downstream
Related
Published
2026-09-18T17:26:52Z
Modified
2026-09-20T08:19:49Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
c-ares: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains
Details

c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long descending pointer chain and many resource records whose NAME or RDATA fields refer to the chain, causing repeated decompression work that grows quadratically with message size. A single crafted response can stall the single-threaded c-ares event loop and deny DNS resolution, without causing memory corruption or information disclosure. This issue is fixed in version 1.34.7.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-407"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69184.json"
}
References

Affected packages

Git / github.com/c-ares/c-ares

Affected ranges

Type
GIT
Repo
https://github.com/c-ares/c-ares
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b
Fixed
f1288bbc70e9a1e0a77134c2382157e52d326aea
Fixed
d63b7de3a3568d14ab1351374b205365aed51cca
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "1.34.7"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

Other
c-ares-1_17_0
c-ares-1_2_0
cares-1_10_0
cares-1_11_0
cares-1_11_0-rc1
cares-1_12_0
cares-1_13_0
cares-1_14_0
cares-1_15_0
cares-1_16_0
cares-1_16_1
cares-1_17_1
cares-1_17_2
cares-1_18_0
cares-1_18_1
cares-1_19_0
cares-1_19_1
cares-1_1_0
cares-1_20_0
cares-1_20_1
cares-1_21_0
cares-1_22_0
cares-1_22_1
cares-1_23_0
cares-1_24_0
cares-1_25_0
cares-1_26_0
cares-1_27_0
cares-1_28_0
cares-1_28_1
cares-1_29_0
cares-1_2_1
cares-1_3_1
cares-1_3_2
cares-1_4_0
cares-1_5_0
cares-1_5_1
cares-1_5_2
cares-1_5_3
cares-1_6_0
cares-1_7_0
cares-1_7_1
cares-1_7_2
cares-1_7_3
cares-1_7_4
cares-1_7_5
cares-1_8_0
cares-1_9_0
cares-1_9_1
curl-7_10_8
curl-7_11_0
curl-7_11_1
curl-7_12_0
curl-7_12_1
curl-7_12_2
curl-7_13_0
curl-7_13_1
curl-7_13_2
curl-7_14_0
curl-7_14_1
curl-7_15_0
curl-7_15_1
curl-7_15_3
curl-7_15_4
curl-7_15_5
curl-7_15_6-prepipeline
curl-7_16_0
curl-7_16_1
curl-7_16_2
curl-7_16_3
curl-7_16_4
curl-7_17_0
curl-7_17_1
curl-7_18_0
curl-7_18_1
curl-7_18_2
curl-7_19_0
curl-7_19_2
curl-7_19_3
curl-7_19_4
curl-7_19_5
curl-7_19_6
curl-7_19_7
curl-7_20_0
v1.*
v1.31.0
v1.34.0
v1.34.1
v1.34.2
v1.34.3
v1.34.4
v1.34.5
v1.34.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-69184.json"
vanir_signatures 
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    {
        "deprecated":  false,
        "digest":  {
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            "length":  744
        },
        "id":  "CVE-2026-69184-2889431b",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b",
        "target":  {
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            "function":  "ares_nameoffset_create"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "63769790708184396424190549000564986090",
            "length":  1533
        },
        "id":  "CVE-2026-69184-4d04b6bb",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea",
        "target":  {
            "file":  "src/lib/record/ares_dns_name.c",
            "function":  "ares_split_dns_name"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
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        "id":  "CVE-2026-69184-51191c96",
        "signature_type":  "Line",
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        "source":  "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea",
        "target":  {
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    },
    {
        "deprecated":  false,
        "digest":  {
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        "id":  "CVE-2026-69184-55c8e212",
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        "source":  "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea",
        "target":  {
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        }
    },
    {
        "deprecated":  false,
        "digest":  {
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            "length":  1533
        },
        "id":  "CVE-2026-69184-6e727d73",
        "signature_type":  "Function",
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        "source":  "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b",
        "target":  {
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            "function":  "ares_split_dns_name"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
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        },
        "id":  "CVE-2026-69184-739304dd",
        "signature_type":  "Line",
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        "source":  "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b",
        "target":  {
            "file":  "src/lib/record/ares_dns_name.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
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                "58693685987069921552036711866965720011",
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        },
        "id":  "CVE-2026-69184-7d78e82b",
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        "source":  "https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b",
        "target":  {
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        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "215120991549543867585004465135371789693",
            "length":  744
        },
        "id":  "CVE-2026-69184-89596405",
        "signature_type":  "Function",
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        "source":  "https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea",
        "target":  {
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            "function":  "ares_nameoffset_create"
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    {
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        "digest":  {
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        },
        "id":  "CVE-2026-69184-ac208db7",
        "signature_type":  "Function",
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        "digest":  {
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]
vanir_signatures_modified 
"2026-09-20T08:19:49Z"