Updated kernel packages are now available to correct security issues and
bugs for Red Hat Enterprise Linux version 2.1 (Itanium).
This update has been rated as having important security impact by the
Red Hat Security Response Team.
The Linux kernel handles the basic functions of the operating system.
This is a kernel maintenance update to Red Hat Enterprise Linux 2.1.
The following security issues are corrected:
A flaw between execve() syscall handling and core dumping of ELF-format
executables allowed local unprivileged users to cause a denial of
service (system crash) or possibly gain privileges. The Common
Vulnerabilities and Exposures project has assigned the name CAN-2005-1263
to this issue.
A flaw in ptrace for Itanium architectures was discovered. A local user
could use this flaw to cause a denial of service (crash) or possibly gain
A race condition in the ia32 compatibility code for the execve system call
was discovered. A local user could use this flaw to cause a denial of
service (kernel panic) or possibly gain privileges. (CAN-2005-1768)
A flaw when freeing a pointer in load_elf_library was discovered. A local
user could potentially use this flaw to cause a denial of service (crash).
The Direct Rendering Manager (DRM) driver did not properly check the DMA
lock, which could allow remote attackers or local users to cause a denial
of service (X Server crash) or possibly modify the video output.
A flaw in the moxa serial driver could allow a local user to perform
privileged operations such as replacing the firmware. (CAN-2005-0504)
The following bug fixes were also made:
- "busy inodes after unmount" error on NFS volumes
- Establish 64-bit limits even for 32-bit threads
- Fix a race condition in __get_lease
- Fix error in IDE disk accounting. This last fix causes IO accounting
to occur only on READ and WRITE operations. This fixes several bugs
in various accounting and statistic utilities.
- Fix kswapd/dquot deadlock bug
- Fix loop control bug in do_shmem_file_read
All Red Hat Enterprise Linux 2.1 Itanium users are advised to upgrade their
kernels to the packages associated with their machine configurations as
listed in this erratum.