It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). Jann Horn discovered that the extended Berkeley Packet Filter (eBPF) implementation in the Linux kernel could overflow reference counters on systems with more than 32GB of physical ram and with RLIMIT_MEMLOCK set to infinite. A local unprivileged attacker could use to create a use-after- free situation, causing a denial of service (system crash) or possibly gain administrative privileges. Various other issues were also addressed.
5ac8ab1044124a2f103555749966cf05ff7355548d25296503bbe9485eb0814cUbuntu Security Notice 3342-2 - USN-3342-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.10 for Ubuntu 16.04 LTS. USN-3333-1 fixed a vulnerability in the Linux kernel. However, that fix introduced regressions for some Java applications. This update addresses the issue. It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
ad451459a82d58adcf3830ea5d4699fed8e20f06f412d9ed72a01f01f346917dUbuntu Security Notice 3342-1 - USN 3326-1 fixed a vulnerability in the Linux kernel. However, that fix introduced regressions for some Java applications. This update addresses the issue. It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. Roee Hay discovered that the parallel port printer driver in the Linux kernel did not properly bounds check passed arguments. A local attacker with write access to the kernel command line arguments could use this to execute arbitrary code. Various other issues were also addressed.
02f110dbf3f133d2c7e542623023dfb8fc8045b5c5147b836e889becc448b849Ubuntu Security Notice 3327-1 - It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. It was discovered that the stack guard page for processes in the Linux kernel was not sufficiently large enough to prevent overlapping with the heap. An attacker could leverage this with another vulnerability to execute arbitrary code and gain administrative privileges Various other issues were also addressed.
c8c82662c76f129144ea64a38a2922ced4fc5e2dd5cb6bd32a3b70e86b0a7190Ubuntu Security Notice 3326-1 - It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. It was discovered that the stack guard page for processes in the Linux kernel was not sufficiently large enough to prevent overlapping with the heap. An attacker could leverage this with another vulnerability to execute arbitrary code and gain administrative privileges Various other issues were also addressed.
ad46e108752d84316d39abb27edf66eba2d2bdfab7dd2aa8588e99776a86620cUbuntu Security Notice 3333-1 - It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. It was discovered that the stack guard page for processes in the Linux kernel was not sufficiently large enough to prevent overlapping with the heap. An attacker could leverage this with another vulnerability to execute arbitrary code and gain administrative privileges Various other issues were also addressed.
4f09ff9dd0d89be7716f1de63c51f7fa6a9d6f67532e75235081f7aa9d16038eIt was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). Andreas Gruenbacher and Jan Kara discovered that the filesystem implementation in the Linux kernel did not clear the setgid bit during a setxattr call. A local attacker could use this to possibly elevate group privileges.
bcd1da354e95152a1d55d4594bee07001348114c492bc49628b78a071250ded3Ubuntu Security Notice 3265-1 - It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. Andrey Konovalov discovered an out-of-bounds access in the IPv6 Generic Routing Encapsulation tunneling implementation in the Linux kernel. An attacker could use this to possibly expose sensitive information. Various other issues were also addressed.
458544e325eb238c58004371dbe9356a95171c61c3dbdaeb26265ab61d0a46c5Ubuntu Security Notice 3265-2 - USN-3265-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
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