{"id":"CVE-2026-23414","state":"PUBLISHED","title":"tls: Purge async_hold in tls_decrypt_async_wait()","description":"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]","publishedAt":"2026-04-02T11:40:55.746Z","updatedAt":"2026-10-19T18:35:42.998Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9f83fd0c179e0f458e824e417f9d5ad53443f685","status":"affected","lessThan":"ac435be7c7613eb13a5a8ceb5182e10b50c9ce87","versionType":"git"},{"version":"c61d4368197d65c4809d9271f3b85325a600586a","status":"affected","lessThan":"2dcf324855c34e7f934ce978aa19b645a8f3ee71","versionType":"git"},{"version":"39dec4ea3daf77f684308576baf483b55ca7f160","status":"affected","lessThan":"6dc11e0bd0a5466bcc76d275c09e5537bd0597dd","versionType":"git"},{"version":"b8a6ff84abbcbbc445463de58704686011edc8e1","status":"affected","lessThan":"9f557c7eae127b44d2e863917dc986a4b6cb1269","versionType":"git"},{"version":"b8a6ff84abbcbbc445463de58704686011edc8e1","status":"affected","lessThan":"fd8037e1f18ca5336934d0e0e7e1a4fe097e749d","versionType":"git"},{"version":"b8a6ff84abbcbbc445463de58704686011edc8e1","status":"affected","lessThan":"84a8335d8300576f1b377ae24abca1d9f197807f","versionType":"git"},{"version":"4fc109d0ab196bd943b7451276690fb6bb48c2e0","status":"affected","versionType":"git"},{"version":"6.1.158","status":"affected","lessThan":"6.1.168","versionType":"semver"},{"version":"6.6.114","status":"affected","lessThan":"6.6.131","versionType":"semver"},{"version":"6.12.55","status":"affected","lessThan":"6.12.80","versionType":"semver"},{"version":"6.17.5","status":"affected","lessThan":"6.18","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_sw.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.131","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.80","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.21","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.11","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_sw.c"]}],"references":["https://git.kernel.org/stable/c/ac435be7c7613eb13a5a8ceb5182e10b50c9ce87","https://git.kernel.org/stable/c/2dcf324855c34e7f934ce978aa19b645a8f3ee71","https://git.kernel.org/stable/c/6dc11e0bd0a5466bcc76d275c09e5537bd0597dd","https://git.kernel.org/stable/c/9f557c7eae127b44d2e863917dc986a4b6cb1269","https://git.kernel.org/stable/c/fd8037e1f18ca5336934d0e0e7e1a4fe097e749d","https://git.kernel.org/stable/c/84a8335d8300576f1b377ae24abca1d9f197807f","https://cert-portal.siemens.com/productcert/html/ssa-082556.html","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23414.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23414","state":"PUBLISHED","datePublished":"2026-04-02T11:40:55.746Z","dateUpdated":"2026-10-19T18:35:42.998Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:46.014Z"},"containers":{"cna":{"title":"tls: Purge async_hold in tls_decrypt_async_wait()","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(&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 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