What’s Vulnerable › Vulnerabilities

CVE-2015-8953

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-10-16 · updated 2026-06-17
• Weakness: CWE-399

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.

Affected products

• Linux kernel: through 4.2.5

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6
• http://www.openwall.com/lists/oss-security/2016/08/23/9
• http://www.securityfocus.com/bid/92611
• https://bugzilla.redhat.com/show_bug.cgi?id=1367814
• https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6
• http://www.openwall.com/lists/oss-security/2016/08/23/9
• http://www.securityfocus.com/bid/92611
• https://bugzilla.redhat.com/show_bug.cgi?id=1367814
• https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5

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