Array index error in the gdthreadevent function in drivers/scsi/gdth.c in the Linux kernel before 2.6.32-rc8 allows local users to cause a denial of service or possibly gain privileges via a negative event index in an IOCTL request.
Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc//fd/ pathname.
Quoting from the upstream commit: Almost all r128's private ioctls require that the CCE state has already been initialised. However, most do not test that this has been done, and will proceed to dereference a null pointer. This may result in a security vulnerability, since some ioctls are unprivileged.
This adds a macro for the common initialisation test and changes all ioctl implementations that require prior initialisation to use that macro.
Also, r128doinitcce() does not test that the CCE state has not been initialised already. Repeated initialisation may lead to a crash or resource leak. This adds that test.
http://git.kernel.org/linus/7dc482dfeeeefcfd000d4271c4626937406756d7
Other references: http://secunia.com/advisories/36707/
The getrandomint function in drivers/char/random.c in the Linux kernel before 2.6.30 produces insufficiently random numbers, which allows attackers to predict the return value, and possibly defeat protection mechanisms based on randomization, via vectors that leverage the function's tendency to "return the same value over and over again for long stretches of time."
Memory leak in the appletalk subsystem in the Linux kernel 2.4.x through 2.4.37.6 and 2.6.x through 2.6.31, when the appletalk and ipddp modules are loaded but the ipddp"N" device is not found, allows remote attackers to cause a denial of service (memory consumption) via IP-DDP datagrams.
Tavis Ormandy and Julien Tinnes, Google Security Team reported that Kernels <= 2.6.18.8 are vulnerable to a NULL pointer dereference issue when using MSGMORE on udp sockets.
Fixed upstream already by: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1e0c14f49d6b393179f423abbac47f85618d3d46
Acknowledgements:
Red Hat would like to thank Tavis Ormandy and Julien Tinnes of the Google Security Team for responsibly reporting this flaw.
A privilege escalation flaw was found in the way udev used to check for the origin of messages sent from the NETLINK service. An attacker could use this flaw to escalate his privileges by sending the NETLINK message from userspace process, instead of from the kernel.
Acknowledgements:
Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for responsibly reporting this flaw.
yast2-backup 2.14.2 through 2.16.6 on SUSE Linux and Novell Linux allows local users to gain privileges via shell metacharacters in filenames used by the backup process.
The Linux kernel before 2.6.25.10 does not properly perform tty operations, which allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving NULL pointer dereference of function pointers in (1) hamradio/6pack.c, (2) hamradio/mkiss.c, (3) irda/irtty-sir.c, (4) pppasync.c, (5) pppsynctty.c, (6) slip.c, (7) wan/x25asy.c, and (8) wireless/strip.c in drivers/net/.