Ubuntu Security Notice 1556-1 - Chen Haogang discovered an integer overflow that could result in memory corruption. A local unprivileged user could use this to crash the system. A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service. Some errors where discovered in the Linux kernel's UDF file system, which is used to mount some CD-ROMs and DVDs. An unprivileged local user could use these flaws to crash the system. Various other issues were also addressed.
34c2a7da04226cd8473337af8a8d4706d3eccc9799d913b76af83ee7b18c2c2bUbuntu Security Notice 1555-1 - Chen Haogang discovered an integer overflow that could result in memory corruption. A local unprivileged user could use this to crash the system. A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service.
c7f820ef558c291242f797a29db3c66ced673b347c670f76cf8d6550232264ddRed Hat Security Advisory 2012-1042-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. It was found that the kvm_vm_ioctl_assign_device() function in the KVM subsystem of a Linux kernel did not check if the user requesting device assignment was privileged or not. A local, unprivileged user on the host could assign unused PCI devices, or even devices that were in use and whose resources were not properly claimed by the respective drivers, which could result in the host crashing.
40cee47ca38fd36212e40e2fc4e2a93d9ca6eec1d81c1a7cbc0f4200899d8b20Red Hat Security Advisory 2012-0743-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. A buffer overflow flaw was found in the macvtap device driver, used for creating a bridged network between the guest and the host in KVM environments. A privileged guest user in a KVM guest could use this flaw to crash the host. Note: This issue only affected hosts that have the vhost_net module loaded with the experimental_zcopytx module option enabled, and that also have macvtap configured for at least one guest.
2480f3d6a1b6962283dd9e04ff5f1211daab9bed3388bb442c0b82afde24b21dUbuntu Security Notice 1394-1 - Aristide Fattori and Roberto Paleari reported a flaw in the Linux kernel's handling of IPv4 icmp packets. A remote user could exploit this to cause a denial of service. Vegard Nossum discovered a leak in the kernel's inotify_init() system call. A local, unprivileged user could exploit this to cause a denial of service. An error was discovered in the kernel's handling of CUSE (Character device in Userspace). A local attacker might exploit this flaw to escalate privilege, if access to /dev/cuse has been modified to allow non-root users. Various other issues were also addressed.
f05a67b15bd12222301eb6d247fe8806a3dc3d18a5f9a4b55842ab137cbdbfeaUbuntu Security Notice 1387-1 - Aristide Fattori and Roberto Paleari reported a flaw in the Linux kernel's handling of IPv4 icmp packets. A remote user could exploit this to cause a denial of service. A flaw was found in the Linux Ethernet bridge's handling of IGMP (Internet Group Management Protocol) packets. An unprivileged local user could exploit this flaw to crash the system. Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. Various other issues were also addressed.
40ff9f09cac0bb58416a79990e0931211e0f67f009ea3cfee34f33dde61736aaUbuntu Security Notice 1386-1 - The linux kernel did not properly account for PTE pages when deciding which task to kill in out of memory conditions. A local, unprivileged could exploit this flaw to cause a denial of service. A flaw was discovered in the TOMOYO LSM's handling of mount system calls. An unprivileged user could oops the system causing a denial of service. Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. Various other issues were also addressed.
592f0d80f08ac87ab6ec43ce2f47735b6630fba60fe855ae8f8ec5015e2ae809Red Hat Security Advisory 2012-0333-01 - Updates have been made to the Linux kernel. SG_IO ioctl SCSI requests on partitions or LVM volumes could be passed to the underlying block device, allowing a privileged user to bypass restrictions and gain read and write access to the entire block device. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. A local, unprivileged user could use a flaw in the Performance Events implementation to cause a denial of service. Various other issues have also been addressed.
ab385ec0a710376d5bd1648fee2d56710fe8b5e7cf9b6e8931a4f3a897ec925aUbuntu Security Notice 1362-1 - Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual interrupt control is not available a local user could use this to cause a denial of service by starting a timer. A flaw was discovered in the XFS filesystem. If a local user mounts a specially crafted XFS image it could potential execute arbitrary code on the system. Various other issues were also addressed.
4a24383a035441c5df124967edbbc89b78b8a16d002c2b220c6894c7c573a97fUbuntu Security Notice 1361-1 - Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user who can mount a FUSE file system could cause a denial of service. A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual interrupt control is not available a local user could use this to cause a denial of service by starting a timer. A flaw was discovered in the XFS filesystem. If a local user mounts a specially crafted XFS image it could potential execute arbitrary code on the system. Various other issues were also addressed.
55aee48caae7e8b3bc23e1710a94503c57f4ade96b00c0e13103c514389168c1Ubuntu Security Notice 1356-1 - A flaw was discovered in the XFS filesystem. If a local user mounts a specially crafted XFS image it could potential execute arbitrary code on the system. Chen Haogang discovered an integer overflow that could result in memory corruption. A local unprivileged user could use this to crash the system. A flaw was found in the linux kernels IPv4 IGMP query processing. A remote attacker could exploit this to cause a denial of service. Various other issues were also addressed.
273765a9dc6a271d3102ed83aa47f5dcfd7f9c56f6f7a215a553292598ed7c31Ubuntu Security Notice 1340-1 - Clement Lecigne discovered a bug in the HFS filesystem. A local attacker could exploit this to cause a kernel oops. A bug was discovered in the XFS filesystem's handling of pathnames. A local attacker could exploit this to crash the system, leading to a denial of service, or gain root privileges. A flaw was found in how the Linux kernel handles user-defined key types. An unprivileged local user could exploit this to crash the system. Various other issues were also addressed.
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