{"apiVersion":"1.0","identifier":"CVE-2026-74611","description":"In the Linux kernel, the following vulnerability has been resolved: tls: rx: restore msg_iter before TLS 1.3 optimistic retry tls_decrypt_sg() advances msg->msg_iter when it maps user pages for the optimistic TLS 1.3 zero-copy path. If the decrypted record turns out not to be unpadded application data, tls_decrypt_sw() retries into a kernel skb, but leaves the iterator advanced. The subsequent copy from the skb then writes decrypted bytes again at a later point in the caller iovecs while recvmsg() reports only the post-retry length. A TLS peer can trigger this after the receiver enables TLS_RX_EXPECT_NO_PAD. Revert the iterator by the number of bytes consumed by the optimistic mapping before retrying without zero-copy. Add a selftest which sends a TLS 1.3 control record with TLS_RX_EXPECT_NO_PAD enabled and verifies that recvmsg() does not overwrite later iovecs beyond the returned length.","publishedAt":"2026-08-22T16:16:33","lastModifiedAt":"2026-08-25T06:18:38","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74611","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00442,"riskScore":1.02,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74611","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74611","en":"https://www.redsauce.net/en/cves/CVE-2026-74611","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74611","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74611","de":"https://www.redsauce.net/de/cves/CVE-2026-74611","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74611","el":"https://www.redsauce.net/el/cves/CVE-2026-74611"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74611"}}