| Revision Date: | 2017-11-22 | Version: | 1 | | Title: | CVE-2017-12190 on Ubuntu 18.04 LTS (bionic) - medium. | | 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. Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel did not properly track reference counts when merging buffers. A local attacker could use this to cause a denial of service (memory exhaustion).
| | Family: | unix | Class: | vulnerability | | Status: | | Reference(s): | CVE-2017-12190
| | Platform(s): | Ubuntu 18.04 LTS
| Product(s): | | | Definition Synopsis | | Ubuntu 18.04 LTS (bionic) is installed. AND Package Information
linux package in bionic, is related to the CVE in some way and has been fixed (note: '4.13.0-17.20').
OR linux-aws package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1001.1').
OR linux-azure package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.2').
OR linux-gcp package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1001.1').
OR linux-kvm package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.2').
OR linux-meta package in bionic, is related to the CVE in some way and has been fixed (note: '4.13.0-17.20').
OR linux-meta-aws package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1001.1').
OR linux-meta-azure package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.2').
OR linux-meta-gcp package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1001.1').
OR linux-meta-kvm package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.2').
OR linux-meta-oem package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.3').
OR linux-meta-raspi2 package in bionic, is related to the CVE in some way and has been fixed (note: '4.13.0-1006.6').
OR linux-oem package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.3').
OR linux-raspi2 package in bionic, is related to the CVE in some way and has been fixed (note: '4.13.0-1006.6').
OR linux-signed package in bionic, is related to the CVE in some way and has been fixed (note: '4.13.0-17.20').
OR linux-signed-azure package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.2').
OR linux-signed-gcp package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1001.1').
OR linux-signed-oem package in bionic, is related to the CVE in some way and has been fixed (note: '4.15.0-1002.3').
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