CVE-2019-3896 - Double Free

Severity

72%

Complexity

39%

Confidentiality

165%

A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel 2.6 branch. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).

A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel 2.6 branch. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).

CVSS 3.0 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.2. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

Type

Linux

First reported 5 years ago

2019-06-19 00:15:00

Last updated 5 years ago

2019-07-01 20:15:00

Affected Software

Linux Kernel

Red Hat Enterprise Linux Desktop 6.0

6.0

Red Hat Enterprise Linux Server 6.0

6.0

Red Hat Enterprise Linux Server Advanced mission critical Update Support (AUS) 6.5

6.5

Red Hat Enterprise Linux Workstation 6.0

6.0

References

108814

Third Party Advisory, VDB Entry

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3896

Issue Tracking, Third Party Advisory

https://security.netapp.com/advisory/ntap-20190710-0002/

https://support.f5.com/csp/article/K04327111

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