CVE-2017-12190: linux linux_kernel Uncontrolled Resource Consumption
Vulnerability summary
CVE-2017-12190 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in linux linux_kernel. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.9% of scored vulnerabilities.
Not severe (CVSS 6.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 21 · Related 8Timeline
- 22-11-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
45%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.53% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-772Missing Release of Resource after Effective LifetimeThe product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu21 products
- linux< 3.13.0-142.191 | < 4.4.0-116.140
- linux-aws< 4.4.0-1014.14 | < 4.4.0-1052.61
- linux-azure< 4.13.0-1005.7
- linux-azure-6.11All versions (No fix recorded)
- linux-azure-fdeAll versions (No fix recorded)
Debian1 product
- linux< 4.13.10-1
Linux1 product
- linux_kernel≤ 4.13.7
3 vendors · 23 products
References
32 links
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8X Refsource CONFIRMIssue TrackingThird Party Advisory
- github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
Show all 32 references
- bugzilla.redhat.com/show_bug.cgi?id=1495089X Refsource CONFIRMIssue TrackingPatchThird Party AdvisoryREPORT
- github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058X Refsource CONFIRMIssue TrackingPatchThird Party Advisory