SB2015111201 - Fedora 21 update for kernel

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Main Vulnerability Database SB2015111201

SB2015111201 - Fedora 21 update for kernel

Published: November 12, 2015 Updated: April 24, 2025

Security Bulletin ID SB2015111201
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 25% Low 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Improper check or handling of exceptional conditions (CVE-ID: CVE-2015-8104)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the KVM subsystem due to many #DB (aka Debug) exceptions, related to svm.c. An adjacent attacker can cause the service to crash.


2) Improper check or handling of exceptional conditions (CVE-ID: CVE-2015-5307)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the KVM subsystem due to many #AC (aka Alignment Check) exceptions, related to svm.c and vmx.c. An adjacent attacker can cause the service to crash.

3) NULL pointer dereference (CVE-ID: CVE-2015-7990)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to read and manipulate data.

The vulnerability exists due to NULL pointer dereference within the rds_sendmsg() function in net/rds/send.c, within the __rds_conn_create() function in net/rds/connection.c. A local user can read and manipulate data.


4) Input validation error (CVE-ID: CVE-2015-7799)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows local users to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call.


Remediation

Install update from vendor's website.

References