[Announce] Kernel RHEL6 042stab134.3

[Vasily Averin]

OpenVZ project released an updated RHEL6 based kernel.
Read below for more information. Everyone is advised to update.

Changes and Download
====================
(since 042stab133.2)

* Rebase to RHEL6u10 kernel 2.6.32-754.6.3.el6
* [Important] A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a denial of service on the system. (CVE-2018-5391)
* [Important] An integer overflow flaw was found in the Linux kernel's create_elf_tables() function. An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system (Mutagen Astronomy). (CVE-2018-14634)
* [Low] The Linux Kernel imposes a size restriction on the arguments and environmental strings passed through RLIMIT_STACK/RLIMIT_INFINITY, but does not take the argument and environment pointers into account, which allows attackers to bypass this limitation. (CVE-2017-1000365)
* Under certain circumstances, ploop could crash after failed execution of kernel thread. (PSBM-88559)
* Under certain circumstances, Acronis Backup could trigger host crash in blk_cbt_update_size(). (PSBM-88570)
* Under certain circumstances, host could crash inside Acronis snumbd driver. (PSBM-88575)
* Under certain circumstances, Acronis Backup could trigger host hard lockup in __cbt_flush_cpu_cache. (PSBM-89323)
* Fixed locking in blk_release_queue() that led to hard lockup in blk_throtl_drain() (was broken in 2.6.32-754.6.3.el6 RHEL6 kernel). (PSBM-89391, RHBZ #1638926)

See also
========
https://access.redhat.com/errata/RHSA-2018:2846
https://www.redhat.com/security/data/cve/CVE-2017-1000365.html
https://www.redhat.com/security/data/cve/CVE-2018-5391.html
https://www.redhat.com/security/data/cve/CVE-2018-14634.html
https://access.redhat.com/security/vulnerabilities/mutagen-astronomy
https://access.redhat.com/articles/3553061

For more info and downloads, see:
https://openvz.org/Download/kernel/rhel6/042stab134.3

Bug reporting
=============
Use http://bugs.openvz.org/ to report any bugs found.

Regards,
    OpenVZ team