|Description||The nfs_permission function in fs/nfs/dir.c in the NFS client implementation in the Linux kernel 18.104.22.168 and earlier, when atomic_open is available, does not check execute (aka EXEC or MAY_EXEC) permission bits, which allows local users to bypass permissions and execute files, as demonstrated by files on an NFSv4 fileserver.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)|
|References||DSA-1809-1, DSA-1844-1, DSA-1865-1|
|NVD severity||medium (attack range: local)|
The information below is based on the following data on fixed versions.