CVE-2015-8953

Public Exploit

Description

fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2016/08/23/9 mailing list exploit third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1367814 issue tracking vdb entry third party advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6 release notes vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5 exploit patch vendor advisory
https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5 patch
http://www.securityfocus.com/bid/92611 vdb entry

Frequently Asked Questions

What is the severity of CVE-2015-8953?
CVE-2015-8953 has been scored as a medium severity vulnerability.
How to fix CVE-2015-8953?
To fix CVE-2015-8953, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-8953 being actively exploited in the wild?
It is possible that CVE-2015-8953 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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