CVE-2015-8953

low-risk
Published 2016-10-16

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.

Do I need to act?

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0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (12)

Exploit http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79ef...
Release Notes http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6
Exploit http://www.openwall.com/lists/oss-security/2016/08/23/9
http://www.securityfocus.com/bid/92611
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1367814
Patch https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b...
Exploit http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79ef...
Release Notes http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6
Exploit http://www.openwall.com/lists/oss-security/2016/08/23/9
http://www.securityfocus.com/bid/92611
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1367814
Patch https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b...
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal