VULNERABILITY INTELLIGENCE
CVE-2009-3623
CVSS score7.8 HIGH
EPSS probability3.47%
CISA KEVNot currently listed
Published2009-10-30
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:N/I:N/A:C
Description
The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
Weakness classification
- CWE-287: Improper Authentication