CVE-2009-1630: Canonical Ubuntu Linux

Medium severity, CVSS 4.4. EPSS: 0.5% chance of exploitation in the next 30 days.

The nfs_permission function in fs/nfs/dir.c in the NFS client implementation in the Linux kernel 2.6.29.3 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.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 8.04 only; version 8.10 only; version 9.04 only
• Debian Debian Linux: version 4.0 only; version 5.0 only
• Linux Linux Kernel: up to and including 2.6.29.3
• Opensuse Opensuse: version 11.0 only; version 11.1 only
• VMware Esx: version 2.5.5 only; version 3.0.3 only; version 3.5 only; version 4.0 only

Published 2009-05-14. Last modified 2026-06-16.