CVE-2017-12190 (NVD)

2017-11-22

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.

linux - Tree: 2b04e8f6bb

(? files)

Filter Settings
Files
Navigation
Patch data:

(on by default)


Patched area: