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 setx
Noroxi assessment
Priority: Monitor (action score 32/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 2.3% (FIRST EPSS); higher than 83.7% of all records.
- Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: linux (Debian:12) 4.17.3-1; linux (Debian:8) 3.16.57-1; kernel-default (SUSE:Linux Enterprise Desktop 12 SP3) 4.4.138-94.39.1.
Low priority for now. Upgrade to linux (Debian:12) 4.17.3-1; linux (Debian:8) 3.16.57-1; kernel-default (SUSE:Linux Enterprise Desktop 12 SP3) 4.4.138-94.39.1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Jun 12, 2018
- Updated
- Jun 16, 2026
- EPSS
- 2.3% · 83th percentile
- CWE
- CWE-119
Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.3%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux14.04
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- linux linux kernel4.5 and later · before 4.9.119
- linux linux kernel2.6.12 and later · before 3.16.58
- linux linux kernel4.15 and later · before 4.17.14
- linux linux kernel4.10 and later · before 4.14.62
- linux linux kernel3.17 and later · before 3.18.118
- linux linux kernel3.19 and later · before 4.4.147
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 4.17.3-1 | 4.17.3-1 |
| Debian:8 | linux | before 3.16.57-1 | 3.16.57-1 |
| SUSE:Linux Enterprise Desktop 12 SP3 | kernel-default | before 4.4.138-94.39.1 | 4.4.138-94.39.1 |
| SUSE:Linux Enterprise Desktop 12 SP3 | kernel-source | before 4.4.138-94.39.1 | 4.4.138-94.39.1 |
| SUSE:Linux Enterprise Desktop 12 SP3 | kernel-syms | before 4.4.138-94.39.1 | 4.4.138-94.39.1 |
| SUSE:Linux Enterprise Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_14 | before 1-4.5.1 | 1-4.5.1 |
| SUSE:Linux Enterprise Live Patching 15 | kernel-livepatch-SLE15_Update_1 | before 1-1.3.1 | 1-1.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 | kernel-default | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 | kernel-source | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 | kernel-zfcpdump | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 | kernel-docs | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 | kernel-obs-build | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 | kernel-syms | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 | kernel-vanilla | before 4.12.14-25.3.1 | 4.12.14-25.3.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-default | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-pae | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-source | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-syms | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-trace | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | kernel-xen | before 3.0.101-0.47.106.43.1 | 3.0.101-0.47.106.43.1 |
| SUSE:Linux Enterprise Real Time 11 SP4 | kernel-rt | before 3.0.101.rt130-69.33.1 | 3.0.101.rt130-69.33.1 |
| SUSE:Linux Enterprise Real Time 11 SP4 | kernel-rt_trace | before 3.0.101.rt130-69.33.1 | 3.0.101.rt130-69.33.1 |
| SUSE:Linux Enterprise Real Time 11 SP4 | kernel-source-rt | before 3.0.101.rt130-69.33.1 | 3.0.101.rt130-69.33.1 |
+18
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Published before and after this one in the same product
- ← EarlierCVE-2017-7794Jun 11, 2018 · On Linux systems, if the content process is compromised, the sandbox broker will allow files to be truncated even though the sandbox explici31Monitor
- ← EarlierCVE-2018-12232Jun 12, 2018 · In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same25Monitor
- Later →CVE-2018-5803Jun 12, 2018 · In the Linux Kernel before version 4.15.8, 4.14.25, 4.9.87, 4.4.121, 4.1.51, and 3.2.102, an error in the "_sctp_make_chunk()" function (net22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 4.17.3-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-default | 4.4.138-94.39.1 · SUSE:Linux Enterprise Desktop 12 SP3 | Package registry (OSV) |
| suse:kernel-docs | 4.4.138-94.39.1 · SUSE:Linux Enterprise Software Development Kit 12 SP3 | Package registry (OSV) |
| suse:kernel-obs-build | 4.4.138-94.39.1 · SUSE:Linux Enterprise Software Development Kit 12 SP3 | Package registry (OSV) |
| suse:kernel-rt | 4.4.138-3.14.1 · SUSE:Linux Enterprise Real Time 12 SP3 | Package registry (OSV) |
| suse:kernel-rt_debug | 4.4.138-3.14.1 · SUSE:Linux Enterprise Real Time 12 SP3 | Package registry (OSV) |
| suse:kernel-source | 4.4.138-94.39.1 · SUSE:Linux Enterprise Desktop 12 SP3 | Package registry (OSV) |
| suse:kernel-source-rt | 4.4.138-3.14.1 · SUSE:Linux Enterprise Real Time 12 SP3 | Package registry (OSV) |
| suse:kernel-syms | 4.4.138-94.39.1 · SUSE:Linux Enterprise Desktop 12 SP3 | Package registry (OSV) |
| suse:kernel-syms-rt | 4.4.138-3.14.1 · SUSE:Linux Enterprise Real Time 12 SP3 | Package registry (OSV) |
| suse:kernel-vanilla | 4.12.14-25.3.1 · SUSE:Linux Enterprise Module for Development Tools 15 | Package registry (OSV) |
| suse:kernel-zfcpdump | 4.12.14-25.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP3_Update_14 | 1-4.5.1 · SUSE:Linux Enterprise Live Patching 12 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (11 more)Show less
- lists.debian.org/debian-lts-announce/2018/07/msg00015.html
- lists.debian.org/debian-lts-announce/2018/07/msg00016.html
- lists.debian.org/debian-lts-announce/2018/07/msg00020.html
- lkml.org/lkml/2018/6/2/2
- marc.info/?l=linux-kernel&m=152814391530549&w=2
- usn.ubuntu.com/3752-1/
- usn.ubuntu.com/3752-2/
- usn.ubuntu.com/3752-3/
- usn.ubuntu.com/3753-1/
- usn.ubuntu.com/3753-2/
- usn.ubuntu.com/3754-1/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.