Race condition in the sclp_ctl_ioctl_sccb function in drivers/s390/char/sclp_ctl.c in the...

Vulnerability Description

Race condition in the sclp_ctl_ioctl_sccb function in drivers/s390/char/sclp_ctl.c in the Linux kernel before 4.6 allows local users to obtain sensitive information from kernel memory by changing a certain length value, aka a "double fetch" vulnerability.

References

• https://github.com/torvalds/linux/commit/532c34b5fbf1687df63b3fcd5b2846312ac943c6
• http://www.debian.org/security/2016/dsa-3616
• http://www.securityfocus.com/bid/91540
• http://www.securityfocus.com/archive/1/538803/30/0/threaded
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=532c34b5fbf1687df63b3fcd5b2846312ac943c6
• https://bugzilla.kernel.org/show_bug.cgi?id=116741