CVE-2018-7492: Null Pointer Dereference
First published: Tue Dec 19 2017(Updated: )
A NULL pointer dereference was found in net/rds/rdma.c:__rds_rdma_map() function in the Linux kernel allowing local attackers to cause a system panic and a denial-of-service. References: <a href="https://patchwork.kernel.org/patch/10096441/">https://patchwork.kernel.org/patch/10096441/</a> <a href="https://xorl.wordpress.com/2017/12/18/linux-kernel-rdma-null-pointer-dereference/">https://xorl.wordpress.com/2017/12/18/linux-kernel-rdma-null-pointer-dereference/</a> <a href="http://seclists.org/oss-sec/2018/q1/191">http://seclists.org/oss-sec/2018/q1/191</a> An upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f3069c6d33f6ae63a1668737bc78aaaa51bff7ca">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f3069c6d33f6ae63a1668737bc78aaaa51bff7ca</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <4.14.7 | |
| Debian GNU/Linux | =7.0 | |
| Debian GNU/Linux | =8.0 | |
| Ubuntu Linux | =12.04 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Ubuntu Linux | =17.10 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 | |
| Linux kernel | <4.14.7 | |
| Debian | =7.0 | |
| Debian | =8.0 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =17.10 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f3069c6d33f6ae63a1668737bc78aaaa51bff7ca
- http://www.securityfocus.com/bid/103185
- https://bugzilla.redhat.com/show_bug.cgi?id=1527393
- https://github.com/torvalds/linux/commit/f3069c6d33f6ae63a1668737bc78aaaa51bff7ca
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
- https://patchwork.kernel.org/patch/10096441/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3674-1/
- https://usn.ubuntu.com/3674-2/
- https://usn.ubuntu.com/3677-1/
- https://usn.ubuntu.com/3677-2/
- https://www.debian.org/security/2018/dsa-4187
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.7
- https://xorl.wordpress.com/2017/12/18/linux-kernel-rdma-null-pointer-dereference/
- http://seclists.org/oss-sec/2018/q1/191
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f3069c6d33f6ae63a1668737bc78aaaa51bff7ca
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1527395
- https://launchpad.net/bugs/cve/CVE-2018-7492
- https://git.kernel.org/linus/f3069c6d33f6ae63a1668737bc78aaaa51bff7ca
- https://security-tracker.debian.org/tracker/CVE-2018-7492
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7492
- https://nvd.nist.gov/vuln/detail/CVE-2018-7492
- https://ubuntu.com/security/CVE-2018-7492
Frequently Asked Questions
What is the severity of CVE-2018-7492?
CVE-2018-7492 has a high severity rating due to its potential to cause a denial-of-service through a system crash.
How do I fix CVE-2018-7492?
To fix CVE-2018-7492, update to a kernel version that is not affected, specifically versions later than 4.14.7.
Which systems are affected by CVE-2018-7492?
CVE-2018-7492 affects Linux kernel versions up to 4.14.7 and specific Debian and Ubuntu releases.
What kind of attack does CVE-2018-7492 enable?
CVE-2018-7492 allows local attackers to cause a system panic, resulting in a denial-of-service.
Is there a patch available for CVE-2018-7492?
Yes, patches are available for CVE-2018-7492 in the form of updated kernel releases for affected systems.
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