CVE-2018-14613: Null Pointer Dereference
First published: Fri Jul 27 2018(Updated: )
An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in io_ctl_map_page() when mounting and operating a crafted btrfs image, because of a lack of block group item validation in check_leaf_item in fs/btrfs/tree-checker.c.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=4.17.10 | |
| 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://www.securityfocus.com/bid/104917
- https://bugzilla.kernel.org/show_bug.cgi?id=199849
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://patchwork.kernel.org/patch/10503147/
- https://usn.ubuntu.com/3932-1/
- https://usn.ubuntu.com/3932-2/
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://launchpad.net/bugs/cve/CVE-2018-14613
- https://security-tracker.debian.org/tracker/CVE-2018-14613
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14613
- https://nvd.nist.gov/vuln/detail/CVE-2018-14613
- https://ubuntu.com/security/CVE-2018-14613
Frequently Asked Questions
What is the severity of CVE-2018-14613?
CVE-2018-14613 has a medium severity rating due to the potential for exploitation through crafted btrfs images.
How do I fix CVE-2018-14613?
To fix CVE-2018-14613, upgrade your Linux kernel to version 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.
Which versions of Linux kernel are affected by CVE-2018-14613?
CVE-2018-14613 affects Linux kernel versions up to and including 4.17.10.
What are the potential impacts of CVE-2018-14613?
The potential impacts of CVE-2018-14613 include system crashes or potential arbitrary code execution when dealing with unvalidated btrfs images.
Can CVE-2018-14613 be exploited remotely?
Yes, CVE-2018-14613 can be exploited remotely if an attacker can convince a user to mount a crafted btrfs image.
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