CVE-2026-0915 (GCVE-0-2026-0915)
Vulnerability from cvelistv5 – Published: 2026-01-15 22:08 – Updated: 2026-01-20 16:03
VLAI
EPSS
VEX
Title
getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler
Summary
Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-20 16:03 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| The GNU C Library | glibc |
Affected:
2.0 , ≤ 2.42
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-01-16T17:06:43.013Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/01/16/6"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-0915",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-20T16:03:19.464174Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-01-20T16:03:52.590Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "glibc",
"vendor": "The GNU C Library",
"versions": [
{
"lessThanOrEqual": "2.42",
"status": "affected",
"version": "2.0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Igor Morgenstern, Aisle Research"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver."
}
],
"value": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver."
}
],
"impacts": [
{
"capecId": "CAPEC-204",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-204 Lifting Sensitive Data Embedded in Cache"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-908",
"description": "CWE-908 Use of Uninitialized Resource",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-15T22:08:41.630Z",
"orgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"shortName": "glibc"
},
"references": [
{
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"assignerShortName": "glibc",
"cveId": "CVE-2026-0915",
"datePublished": "2026-01-15T22:08:41.630Z",
"dateReserved": "2026-01-13T19:02:42.388Z",
"dateUpdated": "2026-01-20T16:03:52.590Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-0915",
"date": "2026-10-04",
"epss": "0.00627",
"percentile": "0.48234"
},
"microsoft_vex": {
"current_release_date": "2026-02-18T14:49:58.000Z",
"cve": "CVE-2026-0915",
"id": "msrc_CVE-2026-0915",
"initial_release_date": "2026-01-02T00:00:00.000Z",
"product_status:fixed": "2",
"product_status:known_affected": "4",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-0915.json",
"version": "3"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "glibc",
"vendor": "The GNU C Library",
"versions": [
{
"lessThanOrEqual": "2.42",
"status": "affected",
"version": "2.0",
"versionType": "custom"
}
]
}
],
"source": "3ff69d7a-14f2-4f67-a097-88dee7810d18"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
"matchCriteriaId": "45D5C7C8-E53C-4AA3-97A6-1DFCBE5ED529",
"versionEndIncluding": "2.42",
"versionStartIncluding": "2.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver."
},
{
"lang": "es",
"value": "Llamar a getnetbyaddr o getnetbyaddr_r con un nsswitch.conf configurado que especifica el backend DNS de la biblioteca para redes y consulta una red con valor cero en la GNU C Library versi\u00f3n 2.0 hasta la versi\u00f3n 2.42 puede filtrar el contenido de la pila al resolvedor DNS configurado."
}
],
"id": "CVE-2026-0915",
"lastModified": "2026-06-17T10:11:37.513",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-0915",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-20T16:03:19.464174Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-01-15T22:16:12.457",
"references": [
{
"source": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"tags": [
"Broken Link"
],
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List"
],
"url": "http://www.openwall.com/lists/oss-security/2026/01/16/6"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"Broken Link"
],
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
}
],
"sourceIdentifier": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-908"
}
],
"source": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-06T03:00:26+00:00",
"cve": "CVE-2026-0915",
"id": "CVE-2026-0915",
"initial_release_date": "2026-01-15T22:08:41.630000+00:00",
"product_status:fixed": "2047",
"product_status:known_affected": "23",
"product_status:known_not_affected": "1008",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "glibc: glibc: Information disclosure via zero-valued network query",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0915.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-16T00:17:42Z",
"cve": "CVE-2026-0915",
"id": "CVE-2026-0915",
"initial_release_date": "2026-01-17T00:25:15Z",
"product_status:first_fixed": "1",
"product_status:known_affected": "618",
"product_status:recommended": "982",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-0915",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-0915.json",
"version": "30"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-01-16T17:06:43.013Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/01/16/6"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-0915",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-20T16:03:19.464174Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-01-20T16:03:45.360Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "glibc",
"vendor": "The GNU C Library",
"versions": [
{
"lessThanOrEqual": "2.42",
"status": "affected",
"version": "2.0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Igor Morgenstern, Aisle Research"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver."
}
],
"value": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver."
}
],
"impacts": [
{
"capecId": "CAPEC-204",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-204 Lifting Sensitive Data Embedded in Cache"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-908",
"description": "CWE-908 Use of Uninitialized Resource",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-15T22:08:41.630Z",
"orgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"shortName": "glibc"
},
"references": [
{
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33802"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"assignerShortName": "glibc",
"cveId": "CVE-2026-0915",
"datePublished": "2026-01-15T22:08:41.630Z",
"dateReserved": "2026-01-13T19:02:42.388Z",
"dateUpdated": "2026-01-20T16:03:52.590Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…