vulnerability
Amazon Linux AMI: CVE-2017-12190: Security patch for kernel (ALAS-2017-925)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:N/C:N/I:N/A:C) | Nov 18, 2017 | Nov 21, 2017 | Oct 14, 2022 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:C)
Published
Nov 18, 2017
Added
Nov 21, 2017
Modified
Oct 14, 2022
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.
Solution
amazon-linux-upgrade-kernel
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