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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2020-05-22T14:09:46

Updated: 2024-08-04T11:14:14.192Z

Reserved: 2020-03-20T00:00:00

Link: CVE-2020-10711

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-05-22T15:15:11.207

Modified: 2023-11-07T03:14:16.173

Link: CVE-2020-10711

cve-icon Redhat

Severity : Important

Publid Date: 2020-05-12T12:00:00Z

Links: CVE-2020-10711 - Bugzilla