ISOMAN

CVE

CVE-2026-49412

The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory. An unprivileged local user can exploit this use-after-free to escalate privileges.

Severity
HIGH
CVSS
7.8
Published
Modified
NVD detailAll CVEs

Linked Releases

DistributionReleaseStatusEvidence
FreeBSD15.0-RELEASE amd64 bootonlyunknownsource
FreeBSD15.0-RELEASE amd64 disc1unknownsource
FreeBSD15.0-RELEASE amd64 dvd1unknownsource
FreeBSD15.0-RELEASE amd64 memstickunknownsource
FreeBSD15.0-RELEASE amd64 mini-memstickunknownsource
FreeBSD15.0-RELEASE aarch64 pine64-ltsunknownsource
FreeBSD15.0-RELEASE aarch64 pine64unknownsource
FreeBSD15.0-RELEASE aarch64 pinebookunknownsource
FreeBSD15.0-RELEASE aarch64 rock64unknownsource
FreeBSD15.0-RELEASE aarch64 rockpro64unknownsource
FreeBSD15.0-RELEASE aarch64 rpiunknownsource
FreeBSD15.0-RELEASE aarch64 bootonlyunknownsource
FreeBSD15.0-RELEASE aarch64 disc1unknownsource
FreeBSD15.0-RELEASE aarch64 dvd1unknownsource
FreeBSD15.0-RELEASE aarch64 memstickunknownsource
FreeBSD15.0-RELEASE aarch64 mini-memstickunknownsource
FreeBSD15.0-RELEASE powerpc64 bootonlyunknownsource
FreeBSD15.0-RELEASE powerpc64 disc1unknownsource
FreeBSD15.0-RELEASE powerpc64le bootonlyunknownsource
FreeBSD15.0-RELEASE powerpc64le disc1unknownsource
FreeBSD15.0-RELEASE riscv64 genericsdunknownsource
FreeBSD15.0-RELEASE riscv64 bootonlyunknownsource
FreeBSD15.0-RELEASE riscv64 disc1unknownsource
FreeBSD15.0-RELEASE riscv64 memstickunknownsource
FreeBSD15.0-RELEASE riscv64 mini-memstickunknownsource
FreeBSD14.4-RELEASE amd64 bootonlyunknownsource
FreeBSD14.4-RELEASE amd64 disc1unknownsource
FreeBSD14.4-RELEASE amd64 dvd1unknownsource
FreeBSD14.4-RELEASE amd64 memstickunknownsource
FreeBSD14.4-RELEASE amd64 mini-memstickunknownsource
FreeBSD14.4-RELEASE aarch64 pine64-ltsunknownsource
FreeBSD14.4-RELEASE aarch64 pine64unknownsource
FreeBSD14.4-RELEASE aarch64 pinebookunknownsource
FreeBSD14.4-RELEASE aarch64 rock64unknownsource
FreeBSD14.4-RELEASE aarch64 rockpro64unknownsource
FreeBSD14.4-RELEASE aarch64 rpiunknownsource
FreeBSD14.4-RELEASE aarch64 bootonlyunknownsource
FreeBSD14.4-RELEASE aarch64 disc1unknownsource
FreeBSD14.4-RELEASE aarch64 dvd1unknownsource
FreeBSD14.4-RELEASE aarch64 memstickunknownsource
FreeBSD14.4-RELEASE aarch64 mini-memstickunknownsource
FreeBSD14.4-RELEASE i386 bootonlyunknownsource
FreeBSD14.4-RELEASE i386 disc1unknownsource
FreeBSD14.4-RELEASE i386 dvd1unknownsource
FreeBSD14.4-RELEASE i386 memstickunknownsource
FreeBSD14.4-RELEASE i386 mini-memstickunknownsource
FreeBSD14.4-RELEASE powerpc bootonlyunknownsource
FreeBSD14.4-RELEASE powerpc disc1unknownsource
FreeBSD14.4-RELEASE powerpc64 bootonlyunknownsource
FreeBSD14.4-RELEASE powerpc64 disc1unknownsource
FreeBSD14.4-RELEASE powerpc64le bootonlyunknownsource
FreeBSD14.4-RELEASE powerpc64le disc1unknownsource
FreeBSD14.4-RELEASE riscv64 genericsdunknownsource
FreeBSD14.4-RELEASE riscv64 bootonlyunknownsource
FreeBSD14.4-RELEASE riscv64 disc1unknownsource
FreeBSD14.4-RELEASE riscv64 memstickunknownsource
FreeBSD14.4-RELEASE riscv64 mini-memstickunknownsource
FreeBSD14.3-RELEASE amd64 bootonlyunknownsource
FreeBSD14.3-RELEASE amd64 disc1unknownsource
FreeBSD14.3-RELEASE amd64 dvd1unknownsource
FreeBSD14.3-RELEASE amd64 memstickunknownsource
FreeBSD14.3-RELEASE amd64 mini-memstickunknownsource
FreeBSD14.3-RELEASE aarch64 pine64-ltsunknownsource
FreeBSD14.3-RELEASE aarch64 pine64unknownsource
FreeBSD14.3-RELEASE aarch64 pinebookunknownsource
FreeBSD14.3-RELEASE aarch64 rock64unknownsource
FreeBSD14.3-RELEASE aarch64 rockpro64unknownsource
FreeBSD14.3-RELEASE aarch64 rpiunknownsource
FreeBSD14.3-RELEASE aarch64 bootonlyunknownsource
FreeBSD14.3-RELEASE aarch64 disc1unknownsource
FreeBSD14.3-RELEASE aarch64 dvd1unknownsource
FreeBSD14.3-RELEASE aarch64 memstickunknownsource
FreeBSD14.3-RELEASE aarch64 mini-memstickunknownsource
FreeBSD14.3-RELEASE i386 bootonlyunknownsource
FreeBSD14.3-RELEASE i386 disc1unknownsource
FreeBSD14.3-RELEASE i386 dvd1unknownsource
FreeBSD14.3-RELEASE i386 memstickunknownsource
FreeBSD14.3-RELEASE i386 mini-memstickunknownsource
FreeBSD14.3-RELEASE powerpc bootonlyunknownsource
FreeBSD14.3-RELEASE powerpc disc1unknownsource
FreeBSD14.3-RELEASE powerpc64 bootonlyunknownsource
FreeBSD14.3-RELEASE powerpc64 disc1unknownsource
FreeBSD14.3-RELEASE powerpc64le bootonlyunknownsource
FreeBSD14.3-RELEASE powerpc64le disc1unknownsource
FreeBSD14.3-RELEASE riscv64 genericsdunknownsource
FreeBSD14.3-RELEASE riscv64 bootonlyunknownsource
FreeBSD14.3-RELEASE riscv64 disc1unknownsource
FreeBSD14.3-RELEASE riscv64 memstickunknownsource
FreeBSD14.3-RELEASE riscv64 mini-memstickunknownsource

References

  1. https://security.freebsd.org/advisories/FreeBSD-SA-26:29.ip6_multicast.asc