Medium severity6.5NVD Advisory· Published Nov 22, 2017· Updated May 13, 2026
CVE-2017-12190
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.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
20- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdIssue TrackingPatchVendor Advisory
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdIssue TrackingPatchVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingPatchThird Party Advisory
- github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058nvdIssue TrackingPatchThird Party Advisory
- github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467nvdIssue TrackingPatchThird Party Advisory
- seclists.org/oss-sec/2017/q4/52nvdIssue TrackingMailing ListThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8nvdIssue TrackingThird Party Advisory
- www.securityfocus.com/bid/101911nvdIssue TrackingThird Party AdvisoryVDB Entry
- access.redhat.com/errata/RHSA-2018:0654nvd
- access.redhat.com/errata/RHSA-2018:0676nvd
- access.redhat.com/errata/RHSA-2018:1062nvd
- access.redhat.com/errata/RHSA-2018:1854nvd
- access.redhat.com/errata/RHSA-2019:1170nvd
- access.redhat.com/errata/RHSA-2019:1190nvd
- lists.debian.org/debian-lts-announce/2017/12/msg00004.htmlnvd
- support.f5.com/csp/article/K93472064nvd
- usn.ubuntu.com/3582-1/nvd
- usn.ubuntu.com/3582-2/nvd
- usn.ubuntu.com/3583-1/nvd
- usn.ubuntu.com/3583-2/nvd
News mentions
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