6.3

CVE-2018-1000204: canonical ubuntu_linux

Modified
AliasesUBUNTU-CVE-2018-1000204DEBIAN-CVE-2018-1000204
Published 26-06-2018Last modified 05-08-2024

Vulnerability summary

CVE-2018-1000204 is a medium (CVSS 6.3) vulnerability in canonical ubuntu_linux. EPSS estimates a 1.91% chance of exploitation in the next 30 days, higher than 79.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.3/10
010
Medium · v2.0 (NVD)
EPSS score
1.91%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 15
DLA-1422-1DLA-1423-1RHSA-2018:2948SUSE-SU-2018:1761-1SUSE-SU-2018:1762-1SUSE-SU-2018:1855-1

Timeline

  1. 26-06-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel heap pages to the userspace. This has been fixed upstream in https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties dispute the relevance of this report, noting that the requirement for an attacker to have both the CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it "virtually impossible to exploit.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.91%

Chance of exploitation in the next 30 days

Percentile

80%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.91% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu22 products
  • linux< 3.13.0-157.207 | < 4.4.0-130.156 | < 4.15.0-33.36
  • linux-aws< 4.4.0-1024.25 | < 4.4.0-1062.71 | < 4.15.0-1020.20
  • linux-azure< 4.15.0-1022.22~16.04.1 | < 4.15.0-1022.23
  • linux-azure-6.11All versions (No fix recorded)
  • linux-azure-fdeAll versions (No fix recorded)
Debian2 products
Canonical1 product
Linux1 product

4 vendors · 26 products

References

23 links
Show all 23 references