518 lines
25 KiB
JSON
518 lines
25 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-23414",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-01-13T15:37:46.014Z",
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"datePublished": "2026-04-02T11:40:55.746Z",
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"dateUpdated": "2026-11-10T12:43:05.479Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:21:34.632Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: Purge async_hold in tls_decrypt_async_wait()\n\nThe async_hold queue pins encrypted input skbs while\nthe AEAD engine references their scatterlist data. Once\ntls_decrypt_async_wait() returns, every AEAD operation\nhas completed and the engine no longer references those\nskbs, so they can be freed unconditionally.\n\nA subsequent patch adds batch async decryption to\ntls_sw_read_sock(), introducing a new call site that\nmust drain pending AEAD operations and release held\nskbs. Move __skb_queue_purge(&ctx->async_hold) into\ntls_decrypt_async_wait() so the purge is centralized\nand every caller -- recvmsg's drain path, the -EBUSY\nfallback in tls_do_decryption(), and the new read_sock\nbatch path -- releases held skbs on synchronization\nwithout each site managing the purge independently.\n\nThis fixes a leak when tls_strp_msg_hold() fails part-way through,\nafter having added some cloned skbs to the async_hold\nqueue. tls_decrypt_sg() will then call tls_decrypt_async_wait() to\nprocess all pending decrypts, and drop back to synchronous mode, but\ntls_sw_recvmsg() only flushes the async_hold queue when one record has\nbeen processed in \"fully-async\" mode, which may not be the case here.\n\n[pabeni@redhat.com: added leak comment]"
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"metrics": [
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{
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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{
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"lang": "en",
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"value": "AV:N - The vulnerable receive-side kTLS path processes TLS records delivered over an established TCP connection, and a remote TLS peer can supply the encrypted records that drive `tls_sw_recvmsg()` into async decryption.\nAC:L - A reasonable deployment with software kTLS RX, TLS 1.2, and an async AEAD provider lets the attacker repeatedly send records that force the async hold path; allocation failure/memory pressure can be induced by sustained remote traffic, so no uncontrollable race is required.\nPR:N - The remote peer does not need local credentials or kernel privileges to send TLS application data to a service using kTLS RX, and no in-kernel authentication gate exists on the receive/decrypt path.\nUI:N - Exploitation only requires the victim service/socket to receive data in its normal operation; no separate user action is needed.\nS:U - The leak affects kernel networking memory and system availability within the same kernel security authority, without crossing a VM, sandbox, or hardware isolation boundary.\nC:N - The bug leaks skb references in `async_hold` after a partial `tls_strp_msg_hold()` failure, but it does not expose kernel memory or create an attacker-readable disclosure primitive.\nI:N - The fixed bug is a cleanup omission causing leaked held skbs, not an out-of-bounds write, UAF, or data/control-flow corruption primitive.\nA:H - The leaked skb clones and pinned receive buffers can accumulate across repeated remote-triggered failures and exhaust kernel memory, producing a denial of service."
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}
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-23414",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "yes"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:07:51.357373Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-401",
|
|
"description": "CWE-401 Missing Release of Memory after Effective Lifetime"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T18:35:42.998Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |