CVE-2026-45257

In FreeBSD systems, a vulnerability in the Kernel TLS (KTLS) receive path allows an unprivileged local user to perform an arbitrary file overwrite . The root cause is that the KTLS receive path decrypts records in place, incorrectly assuming mbufs are anonymous. This fails when data is placed on ...

FreeBSD Security Advisory - FreeBSD-SA-26:26.ktls

FreeBSD Security Advisory - The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify. This assumption does not hold for data placed on a socket by sendfile2, which can reference file-backed memory directly through...

FreeBSD-SA-26:26.ktls

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:26.ktls Security Advisory The FreeBSD Project Topic: Arbitrary file overwrite via the KTLS receive path Category: core Module: ktls Announced: 2026-06-09...