UBUNTU-CVE-2025-40040

In the Linux kernel, the following vulnerability has been resolved: mm/ksm: fix flag-dropping behavior in ksmmadvise syzkaller discovered the following crash: kernel BUG 44.607039 ------------ cut here ------------ 44.607422 kernel BUG at mm/userfaultfd.c:2067! 44.608148 Oops: invalid opcode: 000...

The vulnerability of the userfaultfd_release() function in the fs/userfaultfd.c module of the Linux kernel file system allows a attacker to cause a service failure.

The vulnerability of the userfaultfdrelease function in the fs/userfaultfd.c module of the Linux file system is related to improper permission handling. Exploiting this vulnerability can allow an attacker to cause a service failure...