Kernel security update: CVE-2017-7533; Virtuozzo ReadyKernel patch 28.0 for Virtuozzo 7.0.x¶

1. Overview¶

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to Virtuozzo kernels 3.10.0-327.18.2.vz7.15.2 (Virtuozzo 7.0.0), 3.10.0-327.36.1.vz7.18.7 (Virtuozzo 7.0.1), 3.10.0-327.36.1.vz7.20.18 (Virtuozzo 7.0.3), 3.10.0-514.16.1.vz7.30.10 (Virtuozzo 7.0.4), 3.10.0-514.16.1.vz7.30.15 (Virtuozzo 7.0.4 HF3), and 3.10.0-514.26.1.vz7.33.22 (Virtuozzo 7.0.5).

2. Security Fixes¶

• [Important] A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab’s free list pointer can be corrupted with attacker-controlled data. (CVE-2017-7533)

3. Installing the Update¶

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

4. References¶

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-15.2-28.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-18.7-28.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-20.18-28.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.10-28.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-28.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-28.0-1.vl7/

• https://access.redhat.com/security/cve/CVE-2017-7533

The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2017-070.json.