CVE-2017-14340: Null Pointer Dereference
First published: Wed Sep 13 2017(Updated: )
It was found that XFS filesystem code mishandles a user settable inode flag in the Linux kernels prior to 4.14-rc1 which can cause a local denial of service via a kernel panic. External References: <a href="http://seclists.org/oss-sec/2017/q3/436">http://seclists.org/oss-sec/2017/q3/436</a> An upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=4.13.1 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc
- http://seclists.org/oss-sec/2017/q3/436
- http://www.debian.org/security/2017/dsa-3981
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2
- http://www.securityfocus.com/bid/100851
- https://access.redhat.com/errata/RHSA-2017:2918
- https://bugzilla.redhat.com/show_bug.cgi?id=1491344
- https://github.com/torvalds/linux/commit/b31ff3cdf540110da4572e3e29bd172087af65cc
- https://launchpad.net/bugs/cve/CVE-2017-14340
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc
- https://git.kernel.org/linus/b31ff3cdf540110da4572e3e29bd172087af65cc
- https://security-tracker.debian.org/tracker/CVE-2017-14340
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14340
- https://nvd.nist.gov/vuln/detail/CVE-2017-14340
- https://ubuntu.com/security/CVE-2017-14340
Frequently Asked Questions
What is the severity of CVE-2017-14340?
CVE-2017-14340 has a severity rating of medium, as it can lead to a local denial of service via a kernel panic.
How do I fix CVE-2017-14340?
To fix CVE-2017-14340, update to a Linux kernel version that is 4.14-rc1 or later.
Which versions of Linux are affected by CVE-2017-14340?
CVE-2017-14340 affects Linux kernel versions up to and including 4.13.1.
What is the impact of not patching CVE-2017-14340?
Failure to patch CVE-2017-14340 may result in system instability and potential denial of service.
Who is affected by CVE-2017-14340?
Any user operating an affected version of the Linux kernel could potentially experience a local denial of service due to CVE-2017-14340.
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