CVE ID:	CVE-2017-12190
Description:	The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of- memory condition.
Test IDs:	1.3.6.1.4.1.25623.1.1.1.2.2017.1200
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2017-12190 101911 http://www.securityfocus.com/bid/101911 RHSA-2018:0654 https://access.redhat.com/errata/RHSA-2018:0654 RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:0676 RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2018:1062 RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854 RHSA-2019:1170 https://access.redhat.com/errata/RHSA-2019:1170 RHSA-2019:1190 https://access.redhat.com/errata/RHSA-2019:1190 USN-3582-1 https://usn.ubuntu.com/3582-1/ USN-3582-2 https://usn.ubuntu.com/3582-2/ USN-3583-1 https://usn.ubuntu.com/3583-1/ USN-3583-2 https://usn.ubuntu.com/3583-2/ [debian-lts-announce] 20171210 [SECURITY] [DLA 1200-1] linux security update https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95d78c28b5a85bacbc29b8dba7c04babb9b0d467 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95d78c28b5a85bacbc29b8dba7c04babb9b0d467 http://seclists.org/oss-sec/2017/q4/52 http://seclists.org/oss-sec/2017/q4/52 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8 https://bugzilla.redhat.com/show_bug.cgi?id=1495089 https://bugzilla.redhat.com/show_bug.cgi?id=1495089 https://github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058 https://github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058 https://github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467 https://github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467 https://support.f5.com/csp/article/K93472064?utm_source=f5support&%3Butm_medium=RSS https://support.f5.com/csp/article/K93472064?utm_source=f5support&%3Butm_medium=RSS