{"cve":"CVE-2025-37756","nvd":{"published":"2025-05-01T13:15:54.370","modified":"2026-10-15T22:18:17.173","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: explicitly disallow disconnect\n\nsyzbot discovered that it can disconnect a TLS socket and then\nrun into all sort of unexpected corner cases. I have a vague\nrecollection of Eric pointing this out to us a long time ago.\nSupporting disconnect is really hard, for one thing if offload\nis enabled we'd need to wait for all packets to be _acked_.\nDisconnect is not commonly used, disallow it.\n\nThe immediate problem syzbot run into is the warning in the strp,\nbut that's just the easiest bug to trigger:\n\n  WARNING: CPU: 0 PID: 5834 at net/tls/tls_strp.c:486 tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486\n  RIP: 0010:tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486\n  Call Trace:\n   <TASK>\n   tls_rx_rec_wait+0x280/0xa60 net/tls/tls_sw.c:1363\n   tls_sw_recvmsg+0x85c/0x1c30 net/tls/tls_sw.c:2043\n   inet6_recvmsg+0x2c9/0x730 net/ipv6/af_inet6.c:678\n   sock_recvmsg_nosec net/socket.c:1023 [inline]\n   sock_recvmsg+0x109/0x280 net/socket.c:1045\n   __sys_recvfrom+0x202/0x380 net/socket.c:2237","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/2bcad8fefcecdd5f005d8c550b25d703c063c34a","https://git.kernel.org/stable/c/5071a1e606b30c0c11278d3c6620cd6a24724cf6","https://git.kernel.org/stable/c/7bdcf5bc35ae59fc4a0fa23276e84b4d1534a3cf","https://git.kernel.org/stable/c/8513411ec321942bd3cfed53d5bb700665c67d86","https://git.kernel.org/stable/c/9fcbca0f801580cbb583e9cb274e2c7fbe766ca6"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:11.054312287+00:00"},"epss":{"cve":"CVE-2025-37756","score":0.00298,"percentile":0.22229,"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."]}