{"cve":"CVE-2026-74611","nvd":{"published":"2026-08-22T16:16:33.670","modified":"2026-10-21T13:19:48.090","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntls: rx: restore msg_iter before TLS 1.3 optimistic retry\n\ntls_decrypt_sg() advances msg->msg_iter when it maps user pages for\nthe optimistic TLS 1.3 zero-copy path. If the decrypted record turns\nout not to be unpadded application data, tls_decrypt_sw() retries into\na kernel skb, but leaves the iterator advanced.\n\nThe subsequent copy from the skb then writes decrypted bytes again at\na later point in the caller iovecs while recvmsg() reports only the\npost-retry length. A TLS peer can trigger this after the receiver\nenables TLS_RX_EXPECT_NO_PAD.\n\nRevert the iterator by the number of bytes consumed by the optimistic\nmapping before retrying without zero-copy.\n\nAdd a selftest which sends a TLS 1.3 control record with\nTLS_RX_EXPECT_NO_PAD enabled and verifies that recvmsg() does not\noverwrite later iovecs beyond the returned length.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://git.kernel.org/stable/c/1c8629651cb54f7b51db8fc0b1a9944e4a4b0f5e","https://git.kernel.org/stable/c/3c4e21b1bf8e666a1c141e0f5813ece929570deb","https://git.kernel.org/stable/c/3c837266a734e2a22b24d2d567404a501d405835","https://git.kernel.org/stable/c/68787940274ec89f41dc91b1a68ee1a16a90735f","https://git.kernel.org/stable/c/c71bacacd59166adbea423a04e7474b0e8245b84"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-74611","score":0.00671,"percentile":0.51752,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}