Kernel security update: CVE-2017-12193; Virtuozzo ReadyKernel patch 37.1 for Virtuozzo 7.0.5¶

1. Overview¶

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo kernel 3.10.0-514.26.1.vz7.33.22 (Virtuozzo 7.0.5).

2. Security Fixes¶

• [Moderate] A flaw was found in the implementation of associative arrays in the Linux kernel. A null pointer dereference could happen in assoc_array_apply_edit() due to incorrect node splitting. (CVE-2017-12193)

3. Bug Fixes¶

• sysinfo() returns 0 for uptime if called from a VZ7 container. (PSBM-62094)

• Kernel crash (NULL pointer dereference) in fuse_dev_alloc(). (PSBM-75073)

• Each resize issues invalidate_inode_pages2(), which triggers ultra slow synchronous writeback of all dirty pages. (PSBM-76437)

4. Installing the Update¶

Download, install, and instantly apply the patch to the current kernel by running ‘readykernel update’.

5. References¶

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-37.1-1.vl7/

• https://access.redhat.com/security/cve/CVE-2017-12193

The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2017-102.json.