ANT-2026-5DFBSQR9 · freebsd/freebsd-src · Use-After-Free / Type Confusion

use-after-free high CVE-2026-5398 CVE-2026-6386 Severity Claude high · Security research firm - · Maintainer high REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-5DFBSQR9: Local privilege escalation via ttydropctty tsession UAF + pmappkruupdaterange PDPE walk In...

CVE-2026-6386

In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shmcreatelargepage3 interface. In particular, it...

FreeBSD Security Advisory - FreeBSD-SA-26:11.amd64

FreeBSD Security Advisory - In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shmcreatelargepage3...

FreeBSD -- Missing large page handling in pmap_pkru_update_range()

Problem Description: In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shmcreatelargepage3 interface...