Bug 1400804 (CVE-2016-9777)

Summary: CVE-2016-9777 Kernel: kvm: out of bounds memory access via vcpu_id
Product: [Other] Security Response Reporter: Prasad Pandit <ppandit>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aquini, arm-mgr, bhu, dhoward, fhrbata, gansalmon, iboverma, ichavero, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 03:02:58 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1400805    
Bug Blocks: 1398090    

Description Prasad Pandit 2016-12-02 06:37:05 UTC
Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support
is vulnerable to an out-of-bounds memory access issue. It could occur on x86
platform, while servicing I/O APIC requests with larger vcpu_id.

A guest user/process could use this flaw to crash the host kernel resulting in
DoS or it could potentially be used to escalate privileges on a host.

Upstream patch:
  -> https://git.kernel.org/linus/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755

  -> http://www.openwall.com/lists/oss-security/2016/12/02/2

Comment 1 Prasad Pandit 2016-12-02 06:38:15 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1400805]

Comment 3 Prasad Pandit 2016-12-02 06:41:46 UTC

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.