USN-2688-1: Linux kernel vulnerabilities
Publication date
28 July 2015
Overview
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
Andy Lutomirski discovered a flaw in the Linux kernel’s handling of nested
NMIs (non-maskable interrupts). An unprivileged local user could exploit
this flaw to cause a denial of service (system crash) or potentially
escalate their privileges. (CVE-2015-3290)
Colin King discovered a flaw in the add_key function of the Linux kernel’s
keyring subsystem. A local user could exploit this flaw to cause a denial
of service (memory exhaustion). (CVE-2015-1333)
Andy Lutomirski discovered a flaw that allows user to cause the Linux
kernel to ignore some NMIs (non-maskable interrupts). A local unprivileged
user could exploit this flaw to potentially cause the system to miss
important NMIs resulting in unspecified effects. (CVE-2015-3291)
Andy Lutomirski and Petr Matousek discovered that an NMI (non-maskable
interrupt) that...
Andy Lutomirski discovered a flaw in the Linux kernel’s handling of nested
NMIs (non-maskable interrupts). An unprivileged local user could exploit
this flaw to cause a denial of service (system crash) or potentially
escalate their privileges. (CVE-2015-3290)
Colin King discovered a flaw in the add_key function of the Linux kernel’s
keyring subsystem. A local user could exploit this flaw to cause a denial
of service (memory exhaustion). (CVE-2015-1333)
Andy Lutomirski discovered a flaw that allows user to cause the Linux
kernel to ignore some NMIs (non-maskable interrupts). A local unprivileged
user could exploit this flaw to potentially cause the system to miss
important NMIs resulting in unspecified effects. (CVE-2015-3291)
Andy Lutomirski and Petr Matousek discovered that an NMI (non-maskable
interrupt) that interrupts userspace and encounters an IRET fault is
incorrectly handled by the Linux kernel. An unprivileged local user could
exploit this flaw to cause a denial of service (kernel OOPs), corruption,
or potentially escalate privileges on the system. (CVE-2015-5157)
Update instructions
After a standard system update you need to reboot your computer to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
References
Related notices
Have additional questions?