Linux Kernel up to 4.16.3 fs/xfs/libxfs/xfs_bmap.c xfs_bmap_extents_to_btree null pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.16.3. It has been classified as problematic. Affected by this vulnerability is the function xfs_bmap_extents_to_btree in the library fs/xfs/libxfs/xfs_bmap.c. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2018-10323. The attack requires local access. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 4.16.3 (Operating System). Affected by this vulnerability is the function xfs_bmap_extents_to_btree in the library fs/xfs/libxfs/xfs_bmap.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted xfs image.

The bug was discovered 04/17/2018. The weakness was presented 04/24/2018 (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2018-10323 since 04/24/2018. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110583 (Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4134)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277309 (Fedora Security Update for kernel (FEDORA-2018-ac3b4c7605)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (110583), SecurityFocus (BID 103959†) and CERT Bund (WID-SEC-2022-0532). See VDB-90523 and VDB-117072 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Oracle Linux
  • Debian Linux
  • Open Source Linux Kernel
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle VM
  • NetApp FAS
  • Avaya Aura Communication Manager
  • Avaya Aura Session Manager
  • Avaya Aura Application Enablement Services
  • Avaya Aura System Manager
  • Avaya Aura Experience Portal
  • NetApp AFF

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 110583
Nessus Name: Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4134)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 54612
OpenVAS Name: Debian Security Advisory DSA 4188-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

04/17/2018 🔍
04/24/2018 +6 days 🔍
04/24/2018 +0 days 🔍
04/24/2018 +0 days 🔍
04/24/2018 +0 days 🔍
04/25/2018 +1 days 🔍
06/15/2018 +51 days 🔍
06/18/2018 +3 days 🔍
09/14/2025 +2645 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3752-1⛔
Status: Confirmed

CVE: CVE-2018-10323 (🔍)
GCVE (CVE): GCVE-0-2018-10323
GCVE (VulDB): GCVE-100-117073

OVAL: 🔍

SecurityFocus: 103959 - Linux Kernel 'fs/xfs/libxfs/xfs_bmap.c' Local Denial of Service Vulnerability
CERT Bund: WID-SEC-2022-0532 - Linux Kernel: Mehrere Schwachstellen

See also: 🔍

Entryinfo

Created: 04/25/2018 08:48
Updated: 09/14/2025 03:47
Changes: 04/25/2018 08:48 (78), 01/31/2020 11:59 (5), 03/07/2023 14:38 (4), 09/14/2025 03:47 (21)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!