EUVD-2026-66253

The FIOSSHMLPGCNF ioctl2 operation configures the page size for a largepage shared memory object. This is intended to be used immediately after creating the object, before any memory is allocated for the object. The handler checked whether a page size had already been configured without holding t...

CVE-2026-49427 posixshm: largepage shared memory objects not explicitly wired

Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile2 transmitted such an object with the SFNOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them. An unprivileged local user can abuse the bug to...

CVE-2026-49428: Improperly Controlled Modification of Dynamically-Determined Object Attributes

Certain system calls, such open2 with the OTRUNC flag set, and fspacectl2, could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel...

FreeBSD : FreeBSD -- Multiple vulnerabilities in POSIX largepage objects (91017b3b-74e2-11f1-958d-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 91017b3b-74e2-11f1-958d-bc241121aa0a advisory. Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile2...

FreeBSD-SA-26:44.posixshm

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:44.posixshm Security Advisory The FreeBSD Project Topic: Multiple vulnerabilities in POSIX largepage objects Category: core Module: posixshm Announced:...

FreeBSD Security Advisory - FreeBSD-SA-26:44.posixshm

FreeBSD Security Advisory - Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile2 transmitted such an object with the SFNOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them. Separately, certain...

FreeBSD -- Multiple vulnerabilities in POSIX largepage objects

Problem Description: Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile2 transmitted such an object with the SFNOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them. CVE-2026-49427 Separately,...

EUVD-2026-24592

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...

CVE-2026-6386

A vulnerability exists in the FreeBSD kernel where the subroutine pmap_pkru_update_range() fails to account for 1GB largepage mappings created via the shm_create_largepage(3) interface. The kernel incorrectly treats a page directory page entry as pointing to another page table page. This flaw can...

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...

CVE-2026-6386 Missing large page handling in pmap_pkru_update_range()

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 安全漏洞

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a security vulnerability in FreeBSD, which stems from kernel subroutines that fail to consider the 1GB large-page mappings created using the shmcreatelargepage interface when updating page table entries. This...

PT-2026-34242

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the kernel's handling of protection keys for address ranges. The subroutine responsible for updating page table entries fails to account for 1GB largepage mappings creat...

FreeBSD : FreeBSD -- Missing large page handling in pmap_pkru_update_range() (128951d0-3df0-11f1-bb07-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 128951d0-3df0-11f1-bb07-bc241121aa0a advisory. In order to apply a particular protection key to an address range, the kernel must update the...

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...