In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory…
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.12 to before 3.16.58; 3.17 to before 3.18.118; 3.19 to before 4.4.147; 4.5 to before 4.9.119; 4.10 to before 4.14.62; 4.15 to before 4.17.14 | Vulnerable | Linux |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.12 to before 3.16.58; 3.17 to before 3.18.118; 3.19 to before 4.4.147; 4.5 to before 4.9.119; 4.10 to before 4.14.62; 4.15 to before 4.17.14 Vulnerable ·Linux
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2018-12233
- 2026-10-03 Alias added: GHSA-wwc3-55gv-x4c8
References
Advisory 11
- USN-3752-2
- [debian-lts-announce] 20180714 [SECURITY] [DLA 1422-1] linux security update
- USN-3752-3
- [debian-lts-announce] 20180715 [SECURITY] [DLA 1422-2] linux security update
- USN-3753-2
- USN-3754-1
- [debian-lts-announce] 20180718 [SECURITY] [DLA 1423-1] linux-4.9 new package
- https://marc.info/?l=linux-kernel&m=152814391530549&w=2
- https://lkml.org/lkml/2018/6/2/2
- USN-3752-1
- USN-3753-1
Sources
- CVE-2018-12233 · CVE Program
- CVE-2018-12233 · NVD
- FIRST EPSS
- GHSA-wwc3-55gv-x4c8 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-12233 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences