CVE-2018-1094: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2018-1094 is a high (CVSS 7.1) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.5% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 8Timeline
- 02-04-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The ext4_fill_super function in fs/ext4/super.c in the Linux kernel through 4.15.15 does not always initialize the crc32c checksum driver, which allows attackers to cause a denial of service (ext4_xattr_inode_hash NULL pointer dereference and system crash) via a crafted ext4 image.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.08%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.08% 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 (bugzilla.kernel.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu8 products
- linux< 4.15.0-24.26
- linux-aws< 4.15.0-1011.11
- linux-azure< 4.15.0-1014.14~16.04.1 | < 4.15.0-1014.14
- linux-gcp< 4.15.0-1014.14~16.04.1 | < 4.15.0-1010.10
- linux-hwe< 4.15.0-24.26~16.04.1
Redhat3 products
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04
Debian1 product
- linux< 4.15.17-1
Linux1 product
- linux_kernel≤ 4.15.15
5 vendors · 14 products
