{
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      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
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  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31533.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tls: fix use-after-free in -EBUSY error path of tls_do_encryption\n\nThe -EBUSY handling in tls_do_encryption(), introduced by commit\n859054147318 (\"net: tls: handle backlogging of crypto requests\"), has\na use-after-free due to double cleanup of encrypt_pending and the\nscatterlist entry.\n\nWhen crypto_aead_encrypt() returns -EBUSY, the request is enqueued to\nthe cryptd backlog and the async callback tls_encrypt_done() will be\ninvoked upon completion. That callback unconditionally restores the\nscatterlist entry (sge-\u003eoffset, sge-\u003elength) and decrements\nctx-\u003eencrypt_pending. However, if tls_encrypt_async_wait() returns an\nerror, the synchronous error path in tls_do_encryption() performs the\nsame cleanup again, double-decrementing encrypt_pending and\ndouble-restoring the scatterlist.\n\nThe double-decrement corrupts the encrypt_pending sentinel (initialized\nto 1), making tls_encrypt_async_wait() permanently skip the wait for\npending async callbacks. A subsequent sendmsg can then free the\ntls_rec via bpf_exec_tx_verdict() while a cryptd callback is still\npending, resulting in a use-after-free when the callback fires on the\nfreed record.\n\nFix this by skipping the synchronous cleanup when the -EBUSY async\nwait returns an error, since the callback has already handled\nencrypt_pending and sge restoration.",
  "id": "CVE-2026-31533",
  "modified": "2026-07-08T05:36:18.586567374Z",
  "published": "2026-04-23T15:11:06.955Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02f3ecadb23558bbe068e6504118f1b712d4ece0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e43e0a3c94044acc74b8e0927c27972eb5a59e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2694d408b0e595024e0fc1d64ff9db0358580f74"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/414fc5e5a5aff776c150f1b86770e0a25a35df3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d70eb25b41e9b010828cd12818b06a0c3b04412"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9b8b18364fffce4c451e6f6fd218fa4ab646705"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa9facde6c5005205874c37db3fd25799d741baf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31533.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31533"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption"
}