CVE-2017-5669

The do_shmat function in ipc/shm.c in the Linux kernel through 4.9.12 does not restrict the address calculated by a certain rounding operation, which allows local users to map page zero, and consequently bypass a protection mechanism that exists for the mmap system call, by making crafted shmget and shmat system calls in a privileged context.

• http://www.debian.org/security/2017/dsa-3804Third Party Advisory
• http://www.securityfocus.com/bid/96754Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037918Third Party Advisory, VDB Entry
• https://bugzilla.kernel.org/show_bug.cgi?id=192931Issue Tracking, Patch, Vendor Advisory
• https://github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7Patch, Third Party Advisory
• https://usn.ubuntu.com/3583-1/Third Party Advisory
• https://usn.ubuntu.com/3583-2/Third Party Advisory
• http://www.debian.org/security/2017/dsa-3804Third Party Advisory
• http://www.securityfocus.com/bid/96754Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037918Third Party Advisory, VDB Entry
• https://bugzilla.kernel.org/show_bug.cgi?id=192931Issue Tracking, Patch, Vendor Advisory
• https://github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7Patch, Third Party Advisory
• https://usn.ubuntu.com/3583-1/Third Party Advisory
• https://usn.ubuntu.com/3583-2/Third Party Advisory

Published

Feb 24, 2017

Last Modified

Jun 17, 2026

Status

Modified

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