A flaw was found in the way certain interfaces of the Linux kernel's Infiniband subsystem used write() as bi-directional ioctl() replacement, which could lead to insufficient memory security checks when being invoked using the splice() system call. A local unprivileged user on a system with either Infiniband hardware present or RDMA Userspace Connection Manager Access module explicitly loaded, could use this flaw to escalate their privileges on the system.
Find out more about CVE-2016-4565 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG-2. Future Linux kernel updates for the respective releases might address this issue.
| Base Score | 6.9 |
|---|---|
| Base Metrics | AV:L/AC:M/Au:N/C:C/I:C/A:C |
| Access Vector | Local |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Complete |
| Integrity Impact | Complete |
| Availability Impact | Complete |
| CVSS3 Base Score | 7.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux Advanced Update Support 6.4 (kernel) | RHSA-2016:1581 | 2016-08-09 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2016:1341 | 2016-06-27 |
| Red Hat Enterprise Linux Extended Update Support 6.6 (kernel) | RHSA-2016:1640 | 2016-08-19 |
| Red Hat Enterprise Linux Extended Update Support 6.7 (kernel) | RHSA-2016:1489 | 2016-07-26 |
| Red Hat Enterprise Linux 7 (kernel) | RHSA-2016:1277 | 2016-06-23 |
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2016:1406 | 2016-07-12 |
| Red Hat Enterprise Linux Advanced Update Support 6.2 (kernel) | RHSA-2016:1617 | 2016-08-16 |
| Red Hat Enterprise Linux Extended Update Support 7.1 (kernel) | RHSA-2016:1657 | 2016-08-23 |
| Red Hat Enterprise Linux Advanced Update Support 6.5 (kernel) | RHSA-2016:1814 | 2016-09-06 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2016:1301 | 2016-06-23 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected |
Vulmon