CVE-2018-18386: Incorrect Type Cast
First published: Wed Oct 17 2018(Updated: )
drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <4.14.11 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| 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 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348
- https://access.redhat.com/errata/RHSA-2019:0831
- https://bugzilla.suse.com/show_bug.cgi?id=1094825
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
- https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f056348
- https://usn.ubuntu.com/3849-1/
- https://usn.ubuntu.com/3849-2/
- https://launchpad.net/bugs/cve/CVE-2018-18386
- https://syzkaller.appspot.com/bug?id=17a06459ecad660a3d00c3e41a4b1a7be6bca19e
- https://marc.info/?t=151231153300001&r=1&w=2
- https://marc.info/?t=151398650400001&r=1&w=2
- http://lists.linux.it/pipermail/ltp/2018-May/008071.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348
- https://bugzilla.redhat.com/show_bug.cgi?id=1640598
- https://git.kernel.org/linus/966031f340185eddd05affcf72b740549f056348
- https://security-tracker.debian.org/tracker/CVE-2018-18386
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18386
- https://nvd.nist.gov/vuln/detail/CVE-2018-18386
- https://ubuntu.com/security/CVE-2018-18386
Frequently Asked Questions
What is CVE-2018-18386?
CVE-2018-18386 is a vulnerability in the Linux kernel that allows local attackers to hang/block further usage of pseudo terminal devices.
How severe is CVE-2018-18386?
CVE-2018-18386 has a severity level of medium.
Which Linux kernel versions are affected?
Linux kernel versions before 4.14.11 are affected by CVE-2018-18386.
How can I fix CVE-2018-18386?
To fix CVE-2018-18386, update your Linux kernel to version 4.14.11 or later.
Where can I find more information about CVE-2018-18386?
You can find more information about CVE-2018-18386 at the following references: - [Linux kernel commit](http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348) - [SUSE bugzilla](https://bugzilla.suse.com/show_bug.cgi?id=1094825) - [Linux kernel ChangeLog](https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11)
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