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Oracle Linux: CVE-2019-15239: ELSA-2019-3979: kernel security and bug fix update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2019-15239: ELSA-2019-3979: kernel security and bug fix update (IMPORTANT) (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
08/20/2019
Created
10/04/2019
Added
10/03/2019
Modified
08/06/2024

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.

Solution(s)

  • oracle-linux-upgrade-kernel

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