CVE-2015-8953
UnknownEPSS 0.54%
Last modified
CVE-2015-8953 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.2.5 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5Exploit, Patch, Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6Release Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/08/23/9Exploit, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1367814Issue Tracking, Third Party Advisory, VDB Entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5Exploit, Patch, Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6Release Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/08/23/9Exploit, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1367814Issue Tracking, Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2015-8953?
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.
How severe is CVE-2015-8953?
Severity scoring for CVE-2015-8953 is pending analysis. The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.
How do I fix CVE-2015-8953?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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