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FreeBSD 10.3-RELEASE Errata


This document lists errata items for FreeBSD 10.3-RELEASE, containing significant information discovered after the release or too late in the release cycle to be otherwise included in the release documentation. This information includes security advisories, as well as news relating to the software or documentation that could affect its operation or usability. An up-to-date version of this document should always be consulted before installing this version of FreeBSD.

This errata document for FreeBSD 10.3-RELEASE will be maintained until the release of FreeBSD 10.3-RELEASE.


This errata document contains "late-breaking news" about FreeBSD 10.3-RELEASE Before installing this version, it is important to consult this document to learn about any post-release discoveries or problems that may already have been found and fixed.

Any version of this errata document actually distributed with the release (for example, on a CDROM distribution) will be out of date by definition, but other copies are kept updated on the Internet and should be consulted as the "current errata" for this release. These other copies of the errata are located at, plus any sites which keep up-to-date mirrors of this location.

Source and binary snapshots of FreeBSD 10.3-STABLE also contain up-to-date copies of this document (as of the time of the snapshot).

For a list of all FreeBSD CERT security advisories, see

Security Advisories

Advisory Date Topic


29 April 2016

Multiple ntp vulnerabilities.


29 April 2016

Multiple OpenSSL vulnerabilities.


17 May 2016

Keyboard driver buffer overflow


17 May 2016

Incorrect argument handling in sendmsg(2)


31 May 2016

Kernel stack disclosure in Linux compatibility layer


31 May 2016

Kernel stack disclosure in 4.3BSD compatibility layer


31 May 2016

Absolute path traversal vulnerability


31 May 2016

Absolute path traversal vulnerability


3 June 2016

Multiple ntp vulnerabilties


25 July 2016

heap overflow vulnerability


23 September 2016

Multiple vulnerabilities


26 September 2016

Regression in OpenSSL suite


10 October 2016

Heap overflow vulnerability


10 October 2016

Multiple vulnerabilities


10 October 2016

Multiple vulnerabilities


2 November 2016

Remote Denial of Service vulnerability


2 November 2016

Remote Denial of Service vulnerability


6 December 2016

Possible login(1) argument injection


6 December 2016

link_ntoa(3) buffer overflow


6 December 2016

Possible escape from bhyve(8) virtual machine


22 December 2016

Multiple vulnerabilities


10 January 2017

Multiple vulnerabilities


23 February 2017

Fix OpenSSL RC4_MD5 cipher vulnerability


12 April 2017

Multiple vulnerabilities


27 April 2017

Fix fragment handling panic


12 July 2017

Fix KDC-REP service name validation vulnerability

Errata Notices

Errata Date Topic


4 May 2016

Performance regression in libc hash(3)


4 May 2016

Excessive latency in x86 IPI delivery


4 May 2016

Memory leak in ZFS


25 July 2016

Fix freebsd-update(8) support of FreeBSD 11.0-RELEASE


11 August 2016

Better handle unknown options received from aDHCP server


11 August 2016

Avoid using spin locks for channel message locks


11 August 2016

Enable INQUIRY result check only on Windows 10 host systems


11 August 2016

Register time counter early enough for TSC freq calibration


11 August 2016

Disable incorrect callout in hv_storvsc(4)


11 August 2016

Better handle the GPADL setup failure in Hyper-V


11 August 2016

Fix SCSI INQUIRY checks and error handling


25 October 2016

Several virtual memory issues


6 December 2016

Fix warnings about invalid timezone abbreviations


6 December 2016

Update timezone database information


23 February 2017

Xen migration enhancements


12 July 2017

Boot compatibility improvements with Azure virtual machines

Open Issues

  • FreeBSD/i386 10.3-RELEASE running as a guest operating system on VirtualBox can have a problem with disk I/O access. It depends on some specific hardware configuration and does not depend on a specific version of VirtualBox or host operating system.

    It has been reported that instability may be present on virtual machines running on other hypervisors, such as Xen or KVM.

    It causes various errors and makes FreeBSD quite unstable. Although the cause is still unclear, disabling unmapped I/O works as a workaround. To disable it, choose Escape to loader prompt in the boot menu and enter the following lines from loader(8) prompt, after an OK:

    set vfs.unmapped_buf_allowed=0

    Note that the following line has to be added to /boot/loader.conf after a boot. It disables unmapped I/O at every boot:

  • FreeBSD/i386 10.3-RELEASE installed on ZFS may crash during boot when the ZFS pool mount is attempted while booting an unmodified GENERIC kernel.

    As described in /usr/src/UPDATING entry 20121223, rebuilding the kernel with options KSTACK_PAGES=4 has been observed to resolve the boot-time crash. This, however, is not an ideal solution for inclusion in the GENERIC kernel configuration, as increasing KSTACK_PAGES implicitly decreases available usermode threads in an environment that is already resource-starved.

    Taking into account the heavy resource requirements of ZFS, in addition to the i386-specific tuning requirements for general workloads, using ZFS with the FreeBSD/i386 GENERIC kernel is strongly discouraged.

    If installing FreeBSD/i386 on ZFS, it is possible to configure the system after installation to increase the KSTACK_PAGES.

    When prompted by bsdinstall(8) to perform additional post-installation configuration to the system, select [ YES ].

    This procedure requires the system sources available locally. If the System source code distribution was not selected during installation, it can be obtained using svnlite:

    # mkdir -p /usr/src
    # svnlite co svn:// /usr/src

    Build the kernel-toolchain required to rebuild the kernel:

    # make -C /usr/src kernel-toolchain

    Next, create a kernel configuration file to increase the KSTACK_PAGES option:

    # printf "include GENERIC\noptions KSTACK_PAGES=4\n" > /usr/src/sys/i386/conf/ZFS

    Then build and install the `ZFS` kernel:

    # make -C /usr/src buildkernel KERNCONF=ZFS
    # make -C /usr/src installkernel KERNCONF=ZFS

    It is extremely important to take note that, by default, freebsd-update(8) will install the GENERIC kernel configuration, and as such, freebsd-update(8) consumers are strongly encouraged to avoid FreeBSD-provided kernel binary upgrades with such configurations.

  • Due to an incompatibility between bsdconfig(8) and pkg(8), packages included on the FreeBSD dvd installer will not be recognized by bsdconfig(8).

    To install packages from the dvd1.iso installer, create the /dist target directory, and manually mount the dvd1.iso ISO:

    # mkdir -p /dist
    # mount -t cd9660 /dev/cd0 /dist

    Be sure to use the correct /dev device path for the dvd1.iso ISO installer.

    Next, set REPOS_DIR to the path of the repos/ directory within the installer so pkg(8) will use the correct repository metadata.

    If using sh(1):

    # export REPOS_DIR=/dist/packages/repos

    If using csh(1):

    # setenv REPOS_DIR /dist/packages/repos

    Keep in mind that REPOS_DIR will need to be set again after the current shell session is terminated, if continuing to use the packages provided on the dvd1.iso installer.

    Finally, bootstrap pkg(8) from the ISO, and install required packages:

    # pkg bootstrap
    # pkg install xorg-server xorg gnome3 [...]
  • An issue was discovered where the netstat(1) -s option will cause a segmentation fault on systems with IPSEC compiled into the kernel. The issue was resolved in the stable/10 branch, and an Errata Notice is planned after 10.3-RELEASE is released.

    [2015-08-19] Resolved as FreeBSD-EN-15:12.

  • An issue was discovered that causes make(1) to generate noisy output when doing source-based upgrades from FreeBSD 9.3 and earlier. The issue was reported in PR 202277, and after investigation and determining the issue does not cause source-based upgrades to fail, a post-release Errata Notice is planned.

    [2015-08-19] Resolved as FreeBSD-EN-15:11.

  • An issue with FreeBSD virtual machines with vagrant was discovered that affects the VirtualBox where the virtual machine will not start on the initial boot invoked with vagrant up.

    The issue is due to the virtual machine MAC being unset, as FreeBSD does not provide a default Vagrantfile.

    It has been observed, however, that a subsequent invocation of vagrant up will allow the virtual machine to successfully boot, allowing access via vagrant ssh.

  • [2015-08-16] An error was discovered in the release notes for FreeBSD 10.3-RELEASE regarding the drm device driver. The entry for r282199 states the driver was updated to match the version Linux® 3.8.13 version, however the entry should have noted the change affects device-independent code, and does not bring the drm driver fully in line with the stated Linux® version.

Late-Breaking News

No news.

Last modified on: January 26, 2021 by Sergio Carlavilla Delgado