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CVE-2026-49423

Remote DOS via uninitialized memory access in KTLS receive

When building the iovec array for a received TLS 1.2 CBC record, ktls_ocf_tls_cbc_decrypt() incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes.  This left uninitialized entries in the iovec array.  The iovec array was allocated without zeroing.

A remote TLS peer can cause the kernel to read from uninitialized iovec entries during HMAC computation, resulting in a kernel panic.  The peer must be able to control TCP segmentation such that the first mbuf of a CBC record contains only the 5-byte TLS record header.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerFreeBSD
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Produkt FreeBSD
Default Statusunknown
Version 15.1-RELEASE
Version < p1
Status affected
Version 15.0-RELEASE
Version < p11
Status affected
Version 14.4-RELEASE
Version < p7
Status affected
Version 14.3-RELEASE
Version < p16
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.047
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CWE-908 Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

https://security.freebsd.org/advisories/FreeBSD-SA-26:46.ktls.asc