CVE-2018-12233: canonical ubuntu_linux
Vulnerability summary
CVE-2018-12233 is a high (CVSS 7.8) vulnerability in canonical ubuntu_linux. EPSS estimates a 2.40% chance of exploitation in the next 30 days, higher than 84% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 12Timeline
- 12-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.40%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
Increase +0.03 pp
From 2.37% 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: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu22 products
- linux< 3.13.0-157.207 | < 4.4.0-134.160 | < 4.15.0-33.36
- linux-aws< 4.4.0-1028.31 | < 4.4.0-1066.76 | < 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)
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
Debian1 product
- linux< 4.17.3-1
Linux1 product
- linux_kernel≥ 2.6.12, < 3.16.58 | ≥ 3.17, < 3.18.118 | ≥ 3.19, < 4.4.147 | ≥ 4.5, < 4.9.119 | ≥ 4.10, < 4.14.62 | ≥ 4.15, < 4.17.14
4 vendors · 25 products
References
21 links
lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlMailing ListX Refsource MLISTThird Party AdvisoryVDB Entry- lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlMailing ListX Refsource MLISTThird Party AdvisoryVDB Entry
- lists.debian.org/debian-lts-announce/2018/07/msg00020.htmlMailing ListX Refsource MLISTThird Party AdvisoryVDB Entry