CVE-2018-12233

HIGH
7.8
CVSS Score
Published: June 12, 2018 at 12:00 PM UTC
Updated: June 17, 2026 at 01:37 AM UTC
2 products affected across 2 vendorsLinux KernelUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.6.12 ≤ v < 3.16.583.17 ≤ v < 3.18.1183.19 ≤ v < 4.4.1474.10 ≤ v < 4.14.624.15 ≤ v < 4.17.144.5 ≤ v < 4.9.119
Affected range stops below 3.16.58, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.18.118, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.14.62, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.17.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.147, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.119, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (12)

VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/104452
Mailing Listx_refsource_MLISTThird Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
Mailing Listx_refsource_MLISTThird Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
Mailing Listx_refsource_MLISTThird Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
x_refsource_MISCThird Party AdvisoryVDB Entry
https://lkml.org/lkml/2018/6/2/2
Vendor Advisoryx_refsource_UBUNTUThird Party AdvisoryVDB Entry
https://usn.ubuntu.com/3752-1/
Vendor Advisoryx_refsource_UBUNTUThird Party AdvisoryVDB Entry
https://usn.ubuntu.com/3752-2/

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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