vulnerability

Ubuntu: USN-2908-4: Linux kernel regression

Severity
6
CVSS
(AV:L/AC:M/Au:S/C:C/I:N/A:C)
Published
2016-02-26
Added
2016-02-26
Modified
2025-02-19

Description

USN-2908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 15.10. An incorrect locking fix caused a regression that broke graphics displays for Ubuntu 15.10 guests running within VMWare virtual machines. This update fixes the problem.


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Original advisory details:


halfdog discovered that OverlayFS, when mounting on top of a FUSE mount, incorrectly propagated file attributes, including setuid. A local unprivileged attacker could use this to gain privileges. (CVE-2016-1576) halfdog discovered that OverlayFS in the Linux kernel incorrectly propagated security sensitive extended attributes, such as POSIX ACLs. A local unprivileged attacker could use this to gain privileges. (CVE-2016-1575) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) It was discovered that the Linux kernel's Filesystem in Userspace (FUSE) implementation did not handle initial zero length segments properly. A local attacker could use this to cause a denial of service (unkillable task). (CVE-2015-8785) Andy Lutomirski discovered a race condition in the Linux kernel's translation lookaside buffer (TLB) handling of flush events. A local attacker could use this to cause a denial of service or possibly leak sensitive information. (CVE-2016-2069)

Solution(s)

ubuntu-upgrade-linux-image-4-2-0-30-genericubuntu-upgrade-linux-image-4-2-0-30-generic-lpaeubuntu-upgrade-linux-image-4-2-0-30-lowlatencyubuntu-upgrade-linux-image-4-2-0-30-powerpc-e500mcubuntu-upgrade-linux-image-4-2-0-30-powerpc-smpubuntu-upgrade-linux-image-4-2-0-30-powerpc64-embubuntu-upgrade-linux-image-4-2-0-30-powerpc64-smp
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