CVE-2019-15239

CVE Details

Release Date:	2019-08-20
Impact:	None	What is this?

Description

In the Linux kernel, a certain net/ipv4/tcp_output.c change, which was properly incorporated into 4.16.12, was incorrectly backported to the earlier longterm kernels, introducing a new vulnerability that was potentially more severe than the issue that was intended to be fixed by backporting. Specifically, by adding to a write queue between disconnection and re-connection, a local attacker can trigger multiple use-after-free conditions. This can result in a kernel crash, or potentially in privilege escalation. NOTE: this affects (for example) Linux distributions that use 4.9.x longterm kernels before 4.9.190 or 4.14.x longterm kernels before 4.14.139.

See more information about CVE-2019-15239 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.8
Vector String:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (dtrace-modules-3.8.13-118.39.1.el6uek)	ELSA-2019-4810	2019-10-02
Oracle Linux version 6 (kernel-uek)	ELSA-2019-4808	2019-10-01
Oracle Linux version 6 (kernel-uek)	ELSA-2019-4810	2019-10-02
Oracle Linux version 7 (dtrace-modules-3.8.13-118.39.1.el7uek)	ELSA-2019-4810	2019-10-02
Oracle Linux version 7 (kernel)	ELSA-2019-3979	2019-11-26
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4808	2019-10-01
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4810	2019-10-02
Oracle VM version 3.4 (kernel-uek)	OVMSA-2019-0046	2019-10-02