CVE-2018-5344: Race Condition
First published: Fri Jan 12 2018(Updated: )
A flaw was found in the Linux kernels handling of loopback devices where it mishandles the release (lo_release function) where an attacker who has permissions to setup loopback disks. This may allow an attacker to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact. Upstream patch: <a href="https://github.com/torvalds/linux/commit/ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5">https://github.com/torvalds/linux/commit/ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=4.14.13 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =17.10 | |
| Redhat Virtualization | =4.0 | |
| Redhat Enterprise Linux Desktop | =7.0 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5
- http://www.securityfocus.com/bid/102503
- https://access.redhat.com/errata/RHSA-2018:2948
- https://access.redhat.com/errata/RHSA-2018:3083
- https://access.redhat.com/errata/RHSA-2018:3096
- https://github.com/torvalds/linux/commit/ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5
- https://usn.ubuntu.com/3583-1/
- https://usn.ubuntu.com/3583-2/
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3632-1/
- https://launchpad.net/bugs/cve/CVE-2018-5344
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533911
- https://bugzilla.redhat.com/show_bug.cgi?id=1533909
- https://git.kernel.org/linus/ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5
- https://security-tracker.debian.org/tracker/CVE-2018-5344
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5344
- https://nvd.nist.gov/vuln/detail/CVE-2018-5344
- https://ubuntu.com/security/CVE-2018-5344
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID is CVE-2018-5344.
What is the severity of CVE-2018-5344?
The severity of CVE-2018-5344 is medium.
How does the vulnerability in the Linux kernel through 4.14.13 impact systems?
The vulnerability allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact.
Which software versions are affected by CVE-2018-5344?
The vulnerability affects Linux kernel versions through 4.14.13.
Are there any remediation steps available?
Yes, updating to Linux kernel version 4.15~ or higher is recommended to fix this vulnerability.
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