[LU-9174] kernel update [RHEL7.3 3.10.0-514.10.2.el7]

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

Security Fix(es):

• Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support
  is vulnerable to a null pointer dereference flaw. It could occur on x86
  platform, when emulating an undefined instruction. An attacker could use this
  flaw to crash the host kernel resulting in DoS. (CVE-2016-8630, Important)

• A race condition issue leading to a use-after-free flaw was found in the way
  the raw packet sockets implementation in the Linux kernel networking subsystem
  handled synchronization while creating the TPACKET_V3 ring buffer. A local user
  able to open a raw packet socket (requires the CAP_NET_RAW capability) could use
  this flaw to elevate their privileges on the system. (CVE-2016-8655, Important)

• A flaw was discovered in the Linux kernel's implementation of VFIO. An
  attacker issuing an ioctl can create a situation where memory is corrupted and
  modify memory outside of the expected area. This may overwrite kernel memory and
  subvert kernel execution. (CVE-2016-9083, Important)

• The use of a kzalloc with an integer multiplication allowed an integer
  overflow condition to be reached in vfio_pci_intrs.c. This combined with
  CVE-2016-9083 may allow an attacker to craft an attack and use unallocated
  memory, potentially crashing the machine. (CVE-2016-9084, Moderate)

To see the complete list of bug fixes and enhancements, refer to
the following KnowledgeBase article: https://access.redhat.com/articles/2940041.

Bugs fixed (https://bugzilla.redhat.com/):

1389258 - CVE-2016-9083 kernel: State machine confusion bug in vfio driver leading to memory corruption
1389259 - CVE-2016-9084 kernel: Integer overflow when using kzalloc in vfio driver
1393350 - CVE-2016-8630 kernel: kvm: x86: NULL pointer dereference during instruction decode
1400019 - CVE-2016-8655 kernel: Race condition in packet_set_ring leads to use after free

Issue Links

• is related to: LU-9323 kernel update [RHEL7.3 3.10.0-514.16.1.el7]
• is related to: LU-9143 kernel update [RHEL7.3 3.10.0-514.6.2.el7]

Comments

[Peter Jones]

Landed for 2.10

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/25747/
Subject: LU-9174 kernel: kernel update RHEL7.3 [3.10.0-514.10.2.el7]
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: f8ac16100986b32cbae7b13baf69a30ac598ae7e

[Gerrit Updater]

Bob Glossman ([e-mail]) uploaded a new patch: https://review.whamcloud.com/25747
Subject: LU-9174 kernel: kernel update RHEL7.3 [3.10.0-514.10.2.el7]
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 7520fc56aba86e183ff8e107b7f9155773d2503e