Ubuntu Security Notice 3422-2 - USN-3422-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS. It was discovered that a buffer overflow existed in the Bluetooth stack of the Linux kernel when handling L2CAP configuration responses. A physically proximate attacker could use this to cause a denial of service. Various other issues were also addressed.
e27780348a8f8c6fe548f4fc823a3618d213ad1642631507a915d8fe3daa444cUbuntu Security Notice 3422-1 - It was discovered that a buffer overflow existed in the Bluetooth stack of the Linux kernel when handling L2CAP configuration responses. A physically proximate attacker could use this to cause a denial of service. It was discovered that the asynchronous I/O subsystem of the Linux kernel did not properly set permissions on aio memory mappings in some situations. An attacker could use this to more easily exploit other vulnerabilities. Various other issues were also addressed.
59a73826987ffa71daea232f292915ef55c02017c0d971591db5164b7d4e6e9dRed Hat Security Advisory 2017-2669-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted with attacker-controlled data, which may lead to the privilege escalation.
e48d45b3299e25794baf01efaba70783d2cc37c96df4e1cb6cd794ff41e25ad0Red Hat Security Advisory 2017-1842-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: An use-after-free flaw was found in the Linux kernel which enables a race condition in the L2TPv3 IP Encapsulation feature. A local user could use this flaw to escalate their privileges or crash the system. A flaw was found that can be triggered in keyring_search_iterator in keyring.c if type->match is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.
5ca025049a9aeac274477f25b1f88d0c0690dadc0caf736cba30c2ebc58771e8Red Hat Security Advisory 2017-2077-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: An use-after-free flaw was found in the Linux kernel which enables a race condition in the L2TPv3 IP Encapsulation feature. A local user could use this flaw to escalate their privileges or crash the system. A flaw was found that can be triggered in keyring_search_iterator in keyring.c if type->match is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.
d2c3180ea8e30c9c7a99dd568d556248785dfe383295b24d599dcc9aae61ff25Ubuntu Security Notice 3361-1 - USN-3358-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. Please note that this update changes the Linux HWE kernel to the 4.10 based kernel from Ubuntu 17.04, superseding the 4.8 based HWE kernel from Ubuntu 16.10. Ben Harris discovered that the Linux kernel would strip extended privilege attributes of files when performing a failed unprivileged system call. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
a02dd5836ffae854b87f99a0c65d15d6c8e6dd7ae37fde2f48b13dc8494472d6Andrey Konovalov discovered a use-after-free vulnerability in the DCCP implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges. 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 vulnerabilities were addressed.
91cb2bc988d62a783323447ecb77bf0d50a13e5d484b3ad48a99a46f99980cdfUbuntu Security Notice 3312-2 - USN-3312-1 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 the netfilter netlink implementation in the Linux kernel did not properly validate batch messages. A local attacker with the CAP_NET_ADMIN capability could use this to expose sensitive information or cause a denial of service. Various other issues were also addressed.
9bc4f5c509d58e7374d08b91a33f59e8cc908ffa5e09f39be89e361fa0dd271eUbuntu Security Notice 3312-1 - It was discovered that the netfilter netlink implementation in the Linux kernel did not properly validate batch messages. A local attacker with the CAP_NET_ADMIN capability could use this to expose sensitive information or cause a denial of service. Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build function in the Linux kernel. A local attacker could use to cause a denial of service or possibly execute arbitrary code with administrative privileges. Various other issues were also addressed.
f93b3056d137e6f094a683c78f33de2cfc51578e2b30f5bf0580b49f3136e70eUbuntu Security Notice 3314-1 - It was discovered that the keyring implementation in the Linux kernel in some situations did not prevent special internal keyrings from being joined by userspace keyrings. A privileged local attacker could use this to bypass module verification. It was discovered that a buffer overflow existed in the trace subsystem in the Linux kernel. A privileged local attacker could use this to execute arbitrary code. Various other issues were also addressed.
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