A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.
Vector
NETWORK
Complexity
MEDIUM
Authentication
NONE
Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Redhat Messaging realtime grid 2.0 * * * (not an official CPE)
Redhat Enterprise linux server tus 7.4 * * * (not an official CPE)
Linux Linux kernel * * * * (not an official CPE)
Debian Debian linux 8.0 * * * (not an official CPE)
Debian Debian linux 9.0 * * * (not an official CPE)
Redhat Enterprise linux aus 7.4 * * * (not an official CPE)
Redhat Enterprise linux 8.0 * * * (not an official CPE)
Redhat Enterprise linux 7.0 * * * (not an official CPE)
Redhat Enterprise linux 6.0 * * * (not an official CPE)
Debian Debian linux 10 * * * (not an official CPE)