A flaw was found in the way the Linux kernel handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged system user could use this flaw to crash the system kernel resulting in the denial of service.
Find out more about CVE-2018-8897 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2 may address this issue.
| CVSS3 Base Score | 6.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (redhat-virtualization-host) | RHSA-2018:1710 | 2018-05-23 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (rhev-hypervisor7) | RHSA-2018:1711 | 2018-05-23 |
| Red Hat Enterprise Linux Extended Update Support 6.7 (kernel) | RHSA-2018:1346 | 2018-05-08 |
| Red Hat Enterprise Linux Advanced Update Support 6.5 (kernel) | RHSA-2018:1350 | 2018-05-08 |
| Red Hat Enterprise Linux Extended Update Support 7.4 (kernel) | RHSA-2018:1345 | 2018-05-08 |
| Red Hat Enterprise Linux Advanced Update Support 6.4 (kernel) | RHSA-2018:1349 | 2018-05-08 |
| Red Hat Enterprise Linux Server Update Services for SAP Solutions 7.2 (kernel) | RHSA-2018:1347 | 2018-05-08 |
| Red Hat Enterprise Linux Advanced Update Support 6.6 (kernel) | RHSA-2018:1351 | 2018-05-08 |
| Red Hat Enterprise Linux Extended Update Support 7.3 (kernel) | RHSA-2018:1348 | 2018-05-08 |
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2018:1319 | 2018-05-08 |
| RHEV Hypervisor for RHEL-6 (rhev-hypervisor7) | RHSA-2018:1711 | 2018-05-23 |
| Red Hat Enterprise Linux Server TUS (v. 6.6) (kernel) | RHSA-2018:1351 | 2018-05-08 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2018:1354 | 2018-05-08 |
| Red Hat Enterprise Linux Server TUS (v. 7.2) (kernel) | RHSA-2018:1347 | 2018-05-08 |
| Red Hat Enterprise Linux Server (v. 5 ELS) (kernel) | RHSA-2018:1353 | 2018-05-08 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2018:1355 | 2018-05-08 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts | RHSA-2018:1524 | 2018-05-15 |
| Red Hat Enterprise Linux 7 (kernel) | RHSA-2018:1318 | 2018-05-08 |
| Red Hat Enterprise Linux Advanced Update Support 7.2 (kernel) | RHSA-2018:1347 | 2018-05-08 |
| Red Hat Enterprise Linux Long Life (v. 5.9 server) (kernel) | RHSA-2018:1352 | 2018-05-08 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-alt | Affected |
| RHEV Manager 3 | rhev-hypervisor-ng | Affected |
| RHEV Manager 3 | rhev-hypervisor | Affected |
Vulmon