CVE-2018-20669: canonical ubuntu_linux Improper Input Validation
Vulnerability summary
CVE-2018-20669 is a high (CVSS 7.8) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 47.5% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 13Timeline
- 18-03-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/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
1 foundExploit Reference (openwall.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu24 products
- linux< 4.15.0-115.116
- linux-aws< 4.15.0-1080.84
- linux-aws-fips< 4.15.0-2025.25 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1080.84~16.04.1
- linux-azure< 4.15.0-1093.103~14.04.1 | < 4.15.0-1093.103~16.04.1 | < 5.0.0-1014.14~18.04.1
Netapp4 products
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
Debian1 product
- linux< 5.2.6-1
Linux1 product
- linux_kernel≥ 4.13, < 4.14.185 | ≥ 4.15, < 4.19.129 | ≥ 4.20, < 5.0
5 vendors · 31 products
References
14 links- lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.htmlMailing ListX Refsource MLISTThird Party Advisory
- www.openwall.com/lists/oss-security/2019/01/23/6Mailing ListX Refsource MLISTExploitPatchThird Party Advisory
