CVE-2018-20169: canonical ubuntu_linux Uncontrolled Resource Consumption
Vulnerability summary
CVE-2018-20169 is a high (CVSS 7.2) Uncontrolled Resource Consumption vulnerability in canonical ubuntu_linux. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 47.7% of scored vulnerabilities.
Not severe (CVSS 6.8, physical access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 24 · Related 16Timeline
- 17-12-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the Linux kernel before 4.19.9. The USB subsystem mishandles size checks during the reading of an extra descriptor, related to __usb_get_extra_descriptor in drivers/usb/core/usb.c.
CVSS metrics
5 scores · 4 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated6.8MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.8MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.58%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.58% 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 causeAffected systems
Known conditions: physical access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat35 products
- kernel< 0:3.10.0-693.69.1.el7
- kernel-abi-whitelists< 0:3.10.0-693.69.1.el7
- kernel-bootwrapper< 0:3.10.0-693.69.1.el7
- kernel-debug< 0:3.10.0-693.69.1.el7
- kernel-debug-debuginfo< 0:3.10.0-693.69.1.el7
Ubuntu23 products
- linuxAll versions (No fix recorded) | < 4.4.0-142.168 | < 4.15.0-58.64
- linux-aws< 4.4.0-1038.41 | < 4.4.0-1075.85 | < 4.15.0-1047.49
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1047.49~16.04.1
- linux-azure< 4.15.0-1059.64~14.04.1 | < 4.15.0-1055.60 | < 5.0.0-1014.14~18.04.1
Debian2 products
- linux< 4.19.9-1
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04
Linux1 product
- linux_kernel< 3.16.63 | ≥ 3.17, < 3.18.129 | ≥ 3.19, < 4.4.167 | ≥ 4.5, < 4.9.145 | ≥ 4.10, < 4.14.88 | ≥ 4.15, < 4.19.9
5 vendors · 62 products
References
29 links- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.9X Refsource MISCMailing ListPatchVendor Advisory
- github.com/torvalds/linux/commit/704620afc70cf47abb9d6a1a57f3825d2bca49cfX Refsource MISCPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 29 references
- access.redhat.com/errata/RHSA-2019:3309Vendor AdvisoryX Refsource REDHATThird Party AdvisoryVDB Entry
- access.redhat.com/errata/RHSA-2019:3517Vendor AdvisoryX Refsource REDHATThird Party AdvisoryVDB Entry
