CVE-2018-17182: Use After Free
First published: Wed Sep 19 2018(Updated: )
A security flaw was discovered in the Linux kernel. The vmacache_flush_all() function in mm/vmacache.c mishandles sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations. References: <a href="https://seclists.org/oss-sec/2018/q3/251">https://seclists.org/oss-sec/2018/q3/251</a> An upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.16<3.16.58 | |
| Linux Linux kernel | >=3.17<3.18.123 | |
| Linux Linux kernel | >=3.19<4.4.157 | |
| Linux Linux kernel | >=4.5<4.9.128 | |
| Linux Linux kernel | >=4.10<4.14.71 | |
| Linux Linux kernel | >=4.15<4.18.9 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Netapp Active Iq Performance Analytics Services | ||
| Netapp Element Software | ||
| Google Android | ||
| 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=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2
- http://www.securityfocus.com/bid/105417
- http://www.securityfocus.com/bid/106503
- http://www.securitytracker.com/id/1041748
- https://access.redhat.com/errata/RHSA-2018:3656
- https://github.com/torvalds/linux/commit/7a9cdebdcc17e426fb5287e4a82db1dfe86339b2
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- https://security.netapp.com/advisory/ntap-20190204-0001/
- https://usn.ubuntu.com/3776-1/
- https://usn.ubuntu.com/3776-2/
- https://usn.ubuntu.com/3777-1/
- https://usn.ubuntu.com/3777-2/
- https://usn.ubuntu.com/3777-3/
- https://www.debian.org/security/2018/dsa-4308
- https://www.exploit-db.com/exploits/45497/
- https://www.openwall.com/lists/oss-security/2018/09/18/4
- https://launchpad.net/bugs/cve/CVE-2018-17182
- https://seclists.org/oss-sec/2018/q3/251
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1631206
- https://bugzilla.redhat.com/show_bug.cgi?id=1631205
- https://source.android.com/docs/security/bulletin/2019-01-01 (Advisory)
- https://git.kernel.org/linus/7a9cdebdcc17e426fb5287e4a82db1dfe86339b2
- https://googleprojectzero.blogspot.com/2018/09/a-cache-invalidation-bug-in-linux.html
- https://security-tracker.debian.org/tracker/CVE-2018-17182
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17182
- https://nvd.nist.gov/vuln/detail/CVE-2018-17182
- https://ubuntu.com/security/CVE-2018-17182
Frequently Asked Questions
What is CVE-2018-17182?
CVE-2018-17182 is a vulnerability discovered in the Linux kernel through version 4.18.8 that allows an attacker to trigger a use-after-free and possibly gain privileges.
How severe is CVE-2018-17182?
CVE-2018-17182 has a severity level of 7, which is considered high.
Which software versions are affected by CVE-2018-17182?
CVE-2018-17182 affects Linux kernel versions up to and including version 4.18.8.
How can I fix CVE-2018-17182?
To fix CVE-2018-17182, update your Linux kernel to version 4.19 or later.
Where can I find more information about CVE-2018-17182?
You can find more information about CVE-2018-17182 at the following links: [Link 1](http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2), [Link 2](https://github.com/torvalds/linux/commit/7a9cdebdcc17e426fb5287e4a82db1dfe86339b2), [Link 3](https://www.openwall.com/lists/oss-security/2018/09/18/4).
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