{"id":"CVE-2026-23414","title":"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","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","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.1.158, < 6.1.168","linux_kernel >= 6.6.114, < 6.6.131","linux_kernel >= 6.12.55, < 6.12.80","linux_kernel >= 6.17.5, < 6.18","linux_kernel >= 6.18.1, < 6.18.21","linux_kernel >= 6.19, < 6.19.11","linux_kernel = 6.18","linux_kernel = 7.0"],"patched":["linux_kernel 6.19.11"],"published":"2026-04-02","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:55.510","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-23414","references":[{"url":"https://git.kernel.org/stable/c/2dcf324855c34e7f934ce978aa19b645a8f3ee71","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6dc11e0bd0a5466bcc76d275c09e5537bd0597dd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84a8335d8300576f1b377ae24abca1d9f197807f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9f557c7eae127b44d2e863917dc986a4b6cb1269","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ac435be7c7613eb13a5a8ceb5182e10b50c9ce87","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fd8037e1f18ca5336934d0e0e7e1a4fe097e749d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00364,"epssPercentile":0.30045,"ingestedAt":"2026-09-08T15:33:26.992Z","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T15:07:51.357373Z"},"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_kernel >= 6.1.158, < 6.1.168`\n- `linux_kernel >= 6.6.114, < 6.6.131`\n- `linux_kernel >= 6.12.55, < 6.12.80`\n- `linux_kernel >= 6.17.5, < 6.18`\n- `linux_kernel >= 6.18.1, < 6.18.21`\n- `linux_kernel >= 6.19, < 6.19.11`\n- `linux_kernel = 6.18`\n- `linux_kernel = 7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.11`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}