CVE-2016-4805: Use After Free

First published: Fri May 13 2016(Updated: )

A use after free vulnerability was found in ppp_unregister_channel function. This is triggered when network namespace is removed while ppp_async channel is still registered in it and ppp_unregister_channel() tries to access its per-netns data in the defunct namespace. An attacker who could control this memory that is being used in the defunct namespace could create a denial of service by spinlocking a CPU. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. Upstream patch: <a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f461dcdd296eecedaffffc6bae2bfa90bd7eb89">https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f461dcdd296eecedaffffc6bae2bfa90bd7eb89</a> CVE request: <a href="http://seclists.org/oss-sec/2016/q2/319">http://seclists.org/oss-sec/2016/q2/319</a>

Credit: cve@mitre.org cve@mitre.org

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/type
• agent/first-publish-date
• collector/launchpad-cve
• source/Launchpad
• collector/redhat-bugzilla
• source/Red Hat
• alias/CVE-2016-4805
• agent/author
• agent/severity
• agent/weakness
• collector/nvd-index
• agent/software-canonical-lookup-request
• collector/nvd-cve
• source/NVD
• agent/software-canonical-lookup
• collector/mitre-cve
• source/MITRE
• agent/last-modified-date
• collector/usn-cve
• source/Ubuntu
• collector/security-tracker-debian
• source/Debian
• agent/references
• agent/remedy
• agent/tags
• agent/softwarecombine
• agent/description
• agent/event
• vendor/novell
• canonical/novell suse linux enterprise desktop
• version/novell suse linux enterprise desktop/12.0
• canonical/novell suse linux enterprise workstation extension
• version/novell suse linux enterprise workstation extension/12.0
• canonical/google android
• version/google android/12.0
• canonical/novell suse linux enterprise server
• version/novell suse linux enterprise server/11.0-sp4
• canonical/novell opensuse leap
• version/novell opensuse leap/42.1
• canonical/novell suse linux enterprise software development kit
• version/novell suse linux enterprise software development kit/11.0-sp4
• vendor/redhat
• canonical/redhat enterprise linux
• version/redhat enterprise linux/6.0
• vendor/canonical
• canonical/canonical ubuntu linux
• version/canonical ubuntu linux/12.04
• vendor/linux
• canonical/linux linux kernel
• version/linux linux kernel/2.6.30
• version/linux linux kernel/3.3
• version/linux linux kernel/3.11
• version/linux linux kernel/3.13
• version/linux linux kernel/3.15
• version/linux linux kernel/3.17
• version/linux linux kernel/3.19
• version/linux linux kernel/4.2
• version/linux linux kernel/4.5
• version/novell suse linux enterprise software development kit/12.0
• version/novell suse linux enterprise workstation extension/12.0-sp1
• version/novell suse linux enterprise server/12.0
• version/novell suse linux enterprise desktop/12.0-sp1
• version/redhat enterprise linux/7.0
• vendor/oracle
• canonical/oracle linux
• version/oracle linux/6
• canonical/novell suse linux enterprise real time extension
• version/novell suse linux enterprise real time extension/11.0-sp4
• version/novell suse linux enterprise server/12.0-sp1
• version/novell suse linux enterprise real time extension/12.0-sp1
• version/novell suse linux enterprise software development kit/12.0-sp1
• canonical/novell suse linux enterprise live patching
• version/novell suse linux enterprise live patching/12.0
• canonical/novell suse linux enterprise module for public cloud
• version/novell suse linux enterprise module for public cloud/12.0
• package-manager/debian