{"id":"CVE-2026-72330","revision":"07938b9ceea64fffbf0b2e9c11fabcdd","records":[{"revision":"07938b9ceea64fffbf0b2e9c11fabcdd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72330","aliases":[],"title":"net/tls: Consume empty data records in tls_sw_read_sock()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tls: Consume empty data records in tls_sw_read_sock()\n\nA peer may send a zero-length TLS application_data record; TLS 1.3\nexplicitly permits these as a traffic-analysis countermeasure (RFC\n8446, Section 5.1). After decryption such a record has full_len ==\n0. tls_sw_read_sock() hands it to the read_actor, which has no\npayload to consume and returns zero. The loop treats a zero return\nas backpressure (used <= 0), requeues the skb at the head of\nrx_list, and stops. rx_list is serviced head-first on the next\ncall, so the empty record is dequeued, fails the same way, and is\nrequeued again; every later record on the connection is blocked\nbehind it.\n\ntls_sw_recvmsg() does not stall on this: a zero-length data record\ncopies nothing and falls through to consume_skb(). Mirror that in\nthe read_sock() path by recognizing an empty data record before\nthe actor runs, consuming it, and continuing.","state":0,"publishedAt":"2026-08-15T05:55:40.555+00:00","modifiedAt":"2026-10-16T18:55:18.242+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/tls/tls_sw.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"662fbcec32f4af6bdcf5b4006b792ebe9543d945\",\n                            \"lessThan\": \"0867b0f2513ebc1c475af9898c97f4772a68d964\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"662fbcec32f4af6bdcf5b4006b792ebe9543d945\",\n                            \"lessThan\": \"c6b440cf766a557b08d25f1b571b3d57d039686e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"662fbcec32f4af6bdcf5b4006b792ebe9543d945\",\n                            \"lessThan\": \"e8a4c9fc437b16aef38f86ce3275677e36924259\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"662fbcec32f4af6bdcf5b4006b792ebe9543d945\",\n                            \"lessThan\": \"ebc295ce343600c2d60c1e1e0c5d192080217457\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"662fbcec32f4af6bdcf5b4006b792ebe9543d945\",\n                            \"lessThan\": \"3be28e2c9cd0230cb51fd4967df095273afd3848\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/tls/tls_sw.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0867b0f2513ebc1c475af9898c97f4772a68d964","https://git.kernel.org/stable/c/c6b440cf766a557b08d25f1b571b3d57d039686e","https://git.kernel.org/stable/c/e8a4c9fc437b16aef38f86ce3275677e36924259","https://git.kernel.org/stable/c/ebc295ce343600c2d60c1e1e0c5d192080217457","https://git.kernel.org/stable/c/3be28e2c9cd0230cb51fd4967df095273afd3848"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72330","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72330","identifiers":["CVE-2026-72330"]},"retained":false,"historicalAffected":[]}],"coverage":[]}