CVE-2026-102560
Full vulnerability record from the local CVENow database.
Description
A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.
Severity
CRITICAL
CVSS score
9.8
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-09-29 18:17:08.750000
Last modified
2026-10-22 20:17:05.393000
View original CVE JSON
{
"id": "CVE-2026-102560",
"sourceIdentifier": "[email protected]",
"published": "2026-09-29T18:17:08.750",
"lastModified": "2026-10-22T20:17:05.393",
"vulnStatus": "Analyzed",
"cveTags": [],
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}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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"product": "Red Hat Enterprise Linux 10",
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},
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],
"metrics": {
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{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
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"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 4.7
},
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"ssvcV203": [
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"id": "CVE-2026-102560",
"options": [
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{
"automatable": "yes"
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],
"role": "CISA Coordinator",
"version": "2.0.3"
}
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"configurations": [
{
"nodes": [
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],
"references": [
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"url": "https://access.redhat.com/errata/RHSA-2026:83384",
"source": "[email protected]",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:83618",
"source": "[email protected]",
"tags": [
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},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-102560",
"source": "[email protected]",
"tags": [
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]
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543296",
"source": "[email protected]",
"tags": [
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"Patch",
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]
}
]
}