CVE-2026-23414 (GCVE-0-2026-23414)
Vulnerability from cvelistv5
Published
2026-04-02 11:40
Modified
2026-04-27 14:02
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: Purge async_hold in tls_decrypt_async_wait() The async_hold queue pins encrypted input skbs while the AEAD engine references their scatterlist data. Once tls_decrypt_async_wait() returns, every AEAD operation has completed and the engine no longer references those skbs, so they can be freed unconditionally. A subsequent patch adds batch async decryption to tls_sw_read_sock(), introducing a new call site that must drain pending AEAD operations and release held skbs. Move __skb_queue_purge(&ctx->async_hold) into tls_decrypt_async_wait() so the purge is centralized and every caller -- recvmsg's drain path, the -EBUSY fallback in tls_do_decryption(), and the new read_sock batch path -- releases held skbs on synchronization without each site managing the purge independently. This fixes a leak when tls_strp_msg_hold() fails part-way through, after having added some cloned skbs to the async_hold queue. tls_decrypt_sg() will then call tls_decrypt_async_wait() to process all pending decrypts, and drop back to synchronous mode, but tls_sw_recvmsg() only flushes the async_hold queue when one record has been processed in "fully-async" mode, which may not be the case here. [pabeni@redhat.com: added leak comment]
References
Impacted products
Vendor Product Version
Linux Linux Version: 9f83fd0c179e0f458e824e417f9d5ad53443f685
Version: c61d4368197d65c4809d9271f3b85325a600586a
Version: 39dec4ea3daf77f684308576baf483b55ca7f160
Version: b8a6ff84abbcbbc445463de58704686011edc8e1
Version: b8a6ff84abbcbbc445463de58704686011edc8e1
Version: b8a6ff84abbcbbc445463de58704686011edc8e1
Version: 4fc109d0ab196bd943b7451276690fb6bb48c2e0
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{
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      "descriptions": [
        {
          "lang": "en",
          "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(\u0026ctx-\u003easync_hold) into\ntls_decrypt_async_wait() so the purge is centralized\nand every caller -- recvmsg\u0027s 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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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "providerMetadata": {
        "dateUpdated": "2026-04-27T14:02:13.069Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/ac435be7c7613eb13a5a8ceb5182e10b50c9ce87"
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        {
          "url": "https://git.kernel.org/stable/c/2dcf324855c34e7f934ce978aa19b645a8f3ee71"
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        {
          "url": "https://git.kernel.org/stable/c/84a8335d8300576f1b377ae24abca1d9f197807f"
        }
      ],
      "title": "tls: Purge async_hold in tls_decrypt_async_wait()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23414",
    "datePublished": "2026-04-02T11:40:55.746Z",
    "dateReserved": "2026-01-13T15:37:46.014Z",
    "dateUpdated": "2026-04-27T14:02:13.069Z",
    "state": "PUBLISHED"
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}


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