CVE-2026-42009 (GCVE-0-2026-42009)
Vulnerability from cvelistv5
Published
2026-05-18 12:44
Modified
2026-08-27 12:04
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-475 - Undefined Behavior for Input to API
Summary
A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.
References
Impacted products
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|
Version: 0 |
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"datePublic": "2026-04-29T00:00:00.000Z",
"descriptions": [
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"baseScore": 7.5,
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"confidentialityImpact": "NONE",
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"privilegesRequired": "NONE",
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{\"url\": \"https://access.redhat.com/errata/RHSA-2026:57483\", \"name\": \"RHSA-2026:57483\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:58981\", \"name\": \"RHSA-2026:58981\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2026-42009\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2467279\", \"name\": \"RHBZ#2467279\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-2\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-475\", \"description\": \"Undefined Behavior for Input to API\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-08-26T15:58:13.278Z\"}, \"x_redhatCweChain\": \"CWE-475: Undefined Behavior for Input to API\"}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-42009\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-26T15:58:13.278Z\", \"dateReserved\": \"2026-04-23T11:23:46.516Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-05-18T12:44:45.229Z\", \"assignerShortName\": \"redhat\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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