What’s Vulnerable › Vulnerabilities

CVE-2015-4176

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-05-02 · updated 2026-06-17
• Weakness: CWE-200

Description

fs/namespace.c in the Linux kernel before 4.0.2 does not properly support mount connectivity, which allows local users to read arbitrary files by leveraging user-namespace root access for deletion of a file or directory.

Affected products

• Linux kernel: through 4.0.1

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e0c9c0afd2fc958ffa34b697972721d81df8a56f
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
• http://www.openwall.com/lists/oss-security/2015/06/04/5
• https://bugzilla.redhat.com/show_bug.cgi?id=1249442
• https://github.com/torvalds/linux/commit/e0c9c0afd2fc958ffa34b697972721d81df8a56f
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e0c9c0afd2fc958ffa34b697972721d81df8a56f
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2
• http://www.openwall.com/lists/oss-security/2015/06/04/5
• https://bugzilla.redhat.com/show_bug.cgi?id=1249442
• https://github.com/torvalds/linux/commit/e0c9c0afd2fc958ffa34b697972721d81df8a56f

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