CVE-2016-1576

The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an overlayfs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360Mailing List, Patch, Vendor Advisory
• http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1576.htmlThird Party Advisory
• http://www.halfdog.net/Security/2016/OverlayfsOverFusePrivilegeEscalation/Exploit, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2016/02/24/8Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
• https://bugs.launchpad.net/bugs/1535150Third Party Advisory
• https://launchpadlibrarian.net/235300093/0005-overlayfs-Be-more-careful-about-copying-up-sxid-file.patchMailing List, Patch, Third Party Advisory
• https://launchpadlibrarian.net/235300225/0006-overlayfs-Propogate-nosuid-from-lower-and-upper-moun.patchMailing List, Patch, Third Party Advisory
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360Mailing List, Patch, Vendor Advisory
• http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1576.htmlThird Party Advisory
• http://www.halfdog.net/Security/2016/OverlayfsOverFusePrivilegeEscalation/Exploit, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2016/02/24/8Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
• https://bugs.launchpad.net/bugs/1535150Third Party Advisory
• https://launchpadlibrarian.net/235300093/0005-overlayfs-Be-more-careful-about-copying-up-sxid-file.patchMailing List, Patch, Third Party Advisory
• https://launchpadlibrarian.net/235300225/0006-overlayfs-Propogate-nosuid-from-lower-and-upper-moun.patchMailing List, Patch, Third Party Advisory

Published

May 2, 2016

Last Modified

Jun 17, 2026

Status

Modified

• 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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