high
7.8
CWE
119 362
Advisory Published
CVE Published
Updated

CVE-2018-7566: Buffer Overflow

First published: Wed Feb 28 2018(Updated: )

ALSA sequencer core initializes the event pool on demand by invoking snd_seq_pool_init() when the first write happens and the pool is empty. A user can reset the pool size manually via ioctl concurrently, and this may lead to UAF or out-of-bound access. References: <a href="http://mailman.alsa-project.org/pipermail/alsa-devel/2018-February/132026.html">http://mailman.alsa-project.org/pipermail/alsa-devel/2018-February/132026.html</a> <a href="https://marc.info/?l=alsa-devel&amp;m=151859118611846&amp;w=2">https://marc.info/?l=alsa-devel&amp;m=151859118611846&amp;w=2</a> An upstream fix: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d15d662e89fc667b90cd294b0eb45694e33144da">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d15d662e89fc667b90cd294b0eb45694e33144da</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel=4.15
Suse Linux Enterprise Module For Public Cloud=12
SUSE Linux Enterprise Server=12
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Debian Debian Linux=7.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Redhat Enterprise Linux Desktop=6.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Server=6.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Eus=7.5
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=6.0
Redhat Enterprise Linux Workstation=7.0
Oracle Communications EAGLE Application Processor=16.1.0
Oracle Communications EAGLE Application Processor=16.2.0
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.112-1
6.11.5-1
6.11.7-1

Remedy

http://mailman.alsa-project.org/pipermail/alsa-devel/2018-February/132026.html

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1550142

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d15d662e89fc667b90cd294b0eb45694e33144da

Remedy

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

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Reference Links

Frequently Asked Questions

  • What is CVE-2018-7566?

    CVE-2018-7566 is a vulnerability in the Linux kernel 4.15 that allows a local user to trigger a buffer overflow via a write operation to /dev/snd/seq using the SNDRV_SEQ_IOCTL_SET_CLIENT_POOL ioctl.

  • How severe is CVE-2018-7566?

    CVE-2018-7566 has a severity level of medium.

  • Which versions of Linux are affected by CVE-2018-7566?

    CVE-2018-7566 affects Linux kernel versions 4.15, 4.16, and 4.4.0-1022.22, among others.

  • How can I fix CVE-2018-7566?

    To fix CVE-2018-7566, it is recommended to update to Linux kernel version 4.16 or later.

  • Where can I find more information about CVE-2018-7566?

    You can find more information about CVE-2018-7566 in the references provided: http://mailman.alsa-project.org/pipermail/alsa-devel/2018-February/132026.html, https://marc.info/?l=alsa-devel&m=151859118611846&w=2, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d15d662e89fc667b90cd294b0eb45694e33144da.

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