{"id":"CVE-2026-23414","title":"tls: Purge async_hold in tls_decrypt_async_wait()","summary":"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_decr…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 9f83fd0c179e0f458e824e417f9d5ad53443f685 < ac435be7c7613eb13a5a8ceb5182e10b50c9ce87","Linux >= c61d4368197d65c4809d9271f3b85325a600586a < 2dcf324855c34e7f934ce978aa19b645a8f3ee71","Linux >= 39dec4ea3daf77f684308576baf483b55ca7f160 < 6dc11e0bd0a5466bcc76d275c09e5537bd0597dd","Linux >= b8a6ff84abbcbbc445463de58704686011edc8e1 < 9f557c7eae127b44d2e863917dc986a4b6cb1269","Linux >= b8a6ff84abbcbbc445463de58704686011edc8e1 < fd8037e1f18ca5336934d0e0e7e1a4fe097e749d","Linux >= b8a6ff84abbcbbc445463de58704686011edc8e1 < 84a8335d8300576f1b377ae24abca1d9f197807f","Linux 4fc109d0ab196bd943b7451276690fb6bb48c2e0","Linux >= 6.1.158 < 6.1.168","Linux >= 6.6.114 < 6.6.131","Linux >= 6.12.55 < 6.12.80","Linux >= 6.17.5 < 6.18","Linux 6.18"],"published":"2026-04-02","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:46:02.375Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23414","references":[{"url":"https://git.kernel.org/stable/c/ac435be7c7613eb13a5a8ceb5182e10b50c9ce87"},{"url":"https://git.kernel.org/stable/c/2dcf324855c34e7f934ce978aa19b645a8f3ee71"},{"url":"https://git.kernel.org/stable/c/6dc11e0bd0a5466bcc76d275c09e5537bd0597dd"},{"url":"https://git.kernel.org/stable/c/9f557c7eae127b44d2e863917dc986a4b6cb1269"},{"url":"https://git.kernel.org/stable/c/fd8037e1f18ca5336934d0e0e7e1a4fe097e749d"},{"url":"https://git.kernel.org/stable/c/84a8335d8300576f1b377ae24abca1d9f197807f"}],"tags":["cve.org"],"epss":0.00244,"epssPercentile":0.13815,"ingestedAt":"2026-09-08T15:33:26.992Z","slug":"CVE-2026-23414","body":"## Overview\n\nIn 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]\n\n## Affected\n\n- `Linux >= 9f83fd0c179e0f458e824e417f9d5ad53443f685 < ac435be7c7613eb13a5a8ceb5182e10b50c9ce87`\n- `Linux >= c61d4368197d65c4809d9271f3b85325a600586a < 2dcf324855c34e7f934ce978aa19b645a8f3ee71`\n- `Linux >= 39dec4ea3daf77f684308576baf483b55ca7f160 < 6dc11e0bd0a5466bcc76d275c09e5537bd0597dd`\n- `Linux >= b8a6ff84abbcbbc445463de58704686011edc8e1 < 9f557c7eae127b44d2e863917dc986a4b6cb1269`\n- `Linux >= b8a6ff84abbcbbc445463de58704686011edc8e1 < fd8037e1f18ca5336934d0e0e7e1a4fe097e749d`\n- `Linux >= b8a6ff84abbcbbc445463de58704686011edc8e1 < 84a8335d8300576f1b377ae24abca1d9f197807f`\n- `Linux 4fc109d0ab196bd943b7451276690fb6bb48c2e0`\n- `Linux >= 6.1.158 < 6.1.168`\n- `Linux >= 6.6.114 < 6.6.131`\n- `Linux >= 6.12.55 < 6.12.80`\n- `Linux >= 6.17.5 < 6.18`\n- `Linux 6.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}