CVEvulnerability

CVE-2020-10711

5.9 MEDIUM Published 2020-05-22 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-05-22
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
Weaknesses
CWE-476

Description

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.

Affected configurations

• linux linux kernel (< 5.7) • redhat 3scale 2.0 • redhat openstack 13 • redhat virtualization host 4.0 • redhat enterprise linux 6.0 • redhat enterprise linux 7.0 • redhat enterprise linux 8.0 • redhat enterprise linux aus 7.4 • redhat enterprise linux server tus 7.4 • redhat messaging realtime grid 2.0 • debian debian linux 8.0 • debian debian linux 9.0 • debian debian linux 10.0 • opensuse leap 15.1 • opensuse leap 15.2 • canonical ubuntu linux 14.04 • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 19.10 • canonical ubuntu linux 20.04

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References