It was discovered that a heap-based buffer overflow existed in the Marvell WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that a heap-based buffer overflow existed in the Marvell Libertas WLAN Driver for the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.
7a78ab2637b0c415c10d8aece2f49d7cb0ffca96812fc550881491945ac50eacOn November 12, fixes for several high-severity Intel processor CVEs were released into the Ubuntu kernel, accompanied by a related processor microcode update. Due to the high complexity of the fixes and the required microcode update, we are unable to livepatch this set of CVEs. Please plan to reboot into an updated kernel as soon as possible. Various other issues were also addressed.
fff054687351f5cc49fca94a5fcdb39159f4d22bc5f7c2a6ae86bde91ebf2607It was discovered that a race condition existed in the GFS2 file system in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.
5442de6a129171e9103a7acd9d861ab0fda6074505e32a4ad08db9df45b30c61Peter Pi discovered a buffer overflow in the virtio network backend (vhost_net) implementation in the Linux kernel. An attacker in a guest may be able to use this to cause a denial of service (host OS crash) or possibly execute arbitrary code in the host OS.
2ae10bdb1c9632e027b75b76ad2d6e3b299967f41342245c237b87d05be2b799It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the Bluetooth UART implementation in the Linux kernel did not properly check for missing tty operations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
8660e81d1dad1d0ff9a78d762c78b37cd4c52f125cddd39f7636189484d3352fIt was discovered that the USB video device class implementation in the Linux kernel did not properly validate control bits, resulting in an out of bounds buffer read. A local attacker could use this to possibly expose sensitive information (kernel memory). It was discovered that the Marvell Wireless LAN device driver in the Linux kernel did not properly validate the BSS descriptor. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other vulnerabilities have also been addressed.
3bf6f3467455c33428751c5faf437aa7d6c64fe01342c90cc65e1d94808e2336Vasiliy Kulikov discovered that the Bluetooth stack did not correctly check that device name strings were NULL terminated. A local attacker could exploit this to crash the system, leading to a denial of service, or leak contents of kernel stack memory, leading to a loss of privacy. It was discovered that the Linux kernel on ARM processors allowed a tracing process to modify a syscall after a seccomp decision had been made on that syscall. A local attacker could possibly use this to bypass seccomp restrictions. Various other issues were also addressed.
6816c4785b56430dc635ceb03383ffc424c8c6dc0006c08814cc9b42003fff08Jonathan Looney discovered that an integer overflow existed in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service (system crash). Jonathan Looney discovered that the TCP retransmission queue implementation in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service.
180fed7fbe08b89246da448a793e20ef76b9d263407b8a46ed5a13a5f4acca3bOn May 14, fixes for CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091 were released into the Ubuntu Xenial and Bionic kernels. These CVEs are security vulnerabilities caused by flaws in the design of speculative execution hardware in the computer's CPU. Researchers discovered that memory contents previously stored in microarchitectural buffers of an Intel CPU core may be visible to other processes running on the same core.
69de4e0db4eb9a888d3c2733071c2947fdcefa91285e6f095cc82c73f5ad5711It was discovered that an integer overflow vulnerability existed in the CDRom driver of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.
054a56994c9bd62549cd29e0464ca1a0a7be22a3004cc645c80c0b65070bbdc0It was discovered that the generic SCSI driver in the Linux kernel did not properly enforce permissions on kernel memory access. A local attacker could use this to expose sensitive information or possibly elevate privileges. Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly ensure that xattr information remained in inode bodies. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). Various other issues were also addressed.
fbe29704c99306a1bca47b078a9a33c2572ec3b421ae2b3cfb6ccde48d2a5412It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local attacker could use this to expose sensitive information (memory from the kernel or other processes). It was discovered that the paravirtualization implementation in the Linux kernel did not properly handle some indirect calls, reducing the effectiveness of Spectre v2 mitigations for paravirtual guests. A local attacker could use this to expose sensitive information. Various other issues were also addressed.
1ae6dc1bc4438da330374ea7c963d1a59dd4454020d117a4fef1a28f4474b821Piotr Gabriel Kosinski and Daniel Shapira discovered a stack-based buffer overflow in the CDROM driver implementation of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Jann Horn discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep xattr information consistent in some situations. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues have also been addressed.
0b4cb189d586aa4429e71fb9b98e664320f3da97740056519640d0e0b2c10d5fOn August 14, fixes for CVE-2018-3620 and CVE-2018-3646 were released into the Ubuntu Xenial and Bionic kernels. These CVEs are security vulnerabilities caused by flaws in the design of speculative execution hardware in the computer's CPU. Researchers discovered that memory present in the L1 data cache of an Intel CPU core may be visible to other processes running on the same core.
85663d16e365831ddb6166944044cd7b5c82c443b513338e9cf44622ed20b0c4The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact because sense buffers have different sizes at the CDROM layer and the SCSI layer, as demonstrated by a CDROMREADMODE2 ioctl call. Wen Xu discovered that the ext4 file system implementation in the Linux kernel did not properly initialize the crc32c checksum driver. A local attacker could use this to cause a denial of service (system crash). Various other issues were also addressed.
6d29a3871da9b808e2bd7ade9a1b925586a3080e72b541f756696fbbcbc48d00Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly handle corrupted meta data in some situations. An attacker could use this to specially craft an ext4 file system that caused a denial of service (system crash) when mounted. It was discovered that an information leak vulnerability existed in the floppy driver in the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). Various other issues were also addressed.
d714af351ebe0661ff777dd209b5eddccb3e9cea04d0ba77486507fcb340f6d4Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel contained a branch-pruning logic issue around unreachable code. A local attacker could use this to cause a denial of service. The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image. Various other issues were also addressed.
0e3788ff5b92bdb81c16b39e96e620f55d7e00317265a10546173540afa06d71On May 8, fixes for CVE-2018-1087 and CVE-2018-8897 were released in linux kernel version 4.4.0-124.148. These CVEs are both related to the way that the linux kernel handles certain interrupt and exception instructions. If an interrupt or exception instruction (INT3, SYSCALL, etc.) is immediately preceded by a MOV SS or POP SS instruction, the resulting interrupt will be incorrectly handled, possibly crashing the operating system. The issue can be triggered by an unprivileged user. The fix for this problem requires modification of the interrupt descriptor tables (IDT), and modification of the interrupt handlers. Livepatch is unable to safely modify these areas, so upgrading to a corrected kernel and rebooting is required to fix the problem.
0ed9608f57e15a5b058be5eb06c92f72ea884cf0e997d30b7285a27811e380abJann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that a race condition leading to a use-after-free vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.
39ead24f1d46a53a4118ca65333192e8b23de00376f175ad713483a533c61a56Wi-Fi Protected Access (WPA and WPA2) allows re-installation of the Group Temporal Key (GTK) during the group key handshake, allowing an attacker within radio range to replay frames from access points to clients. Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
3fde9377ed3b41ddea90371b60b3d05b2204d2683198fbcab8cd5b1e3776aaa3On February 22, fixes for CVE-2017-5715 were released into the Ubuntu Xenial kernel version 4.4.0-116.140. This CVE, also known as "Spectre," is caused by flaws in the design of speculative execution hardware in the computer's CPU, and could be used to access sensitive information in kernel memory.
72d363acb6dc156e006e909ac1b2d43d8475b46890268147bf31b5fba6a2cc9eOn January 9, fixes for CVE-2017-5754 were released into the Ubuntu Xenial kernel version 4.4.0-108.131. This CVE, also known as "Meltdown," is a security vulnerability caused by flaws in the design of speculative execution hardware in the computer's CPU.
d1f83d5380c45fea8b0f7c98adba0bf5365481ee9ac8b2cebf7d26e5186c74c9Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the Linux kernel did not properly handle copy-on- write of transparent huge pages. A local attacker could use this to cause a denial of service (application crashes) or possibly gain administrative privileges. It was discovered that a race condition existed in the ALSA subsystem of the Linux kernel when creating and deleting a port via ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
35d9c5bcbc24182886ab41d96c51ca6c0855f15b3e7680d8f817e85810abee0fAnthony Perard discovered that the Xen virtual block driver did not properly initialize some data structures before passing them to user space. A local attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. Bo Zhang discovered that the netlink wireless configuration interface in the Linux kernel did not properly validate attributes when handling certain requests. A local attacker with the CAP_NET_ADMIN could use this to cause a denial of service (system crash). It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service (system crash). Otto Ebeling discovered that the memory manager in the Linux kernel did not properly check the effective UID in some situations. A local attacker could use this to expose sensitive information.
4ac498fe64bdf58c75838bf98a75ded8239a7ff13c95ce564a4824dd91f56222Anthony Perard discovered that the Xen virtual block driver did not properly initialize some data structures before passing them to user space. A local attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. Bo Zhang discovered that the netlink wireless configuration interface in the Linux kernel did not properly validate attributes when handling certain requests. A local attacker with the CAP_NET_ADMIN could use this to cause a denial of service (system crash). It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service (system crash). Otto Ebeling discovered that the memory manager in the Linux kernel did not properly check the effective UID in some situations. A local attacker could use this to expose sensitive information.
edb82348b5a039b33b9384fa15982bf40763c4759bd961c0919c901dad68ef13
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