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Ubuntu: (CVE-2019-15239): linux vulnerability

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Ubuntu: (CVE-2019-15239): linux vulnerability

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
08/20/2019
Created
11/21/2024
Added
11/19/2024
Modified
11/27/2024

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)

  • ubuntu-upgrade-linux
  • ubuntu-upgrade-linux-aws
  • ubuntu-upgrade-linux-kvm
  • ubuntu-upgrade-linux-lts-xenial
  • ubuntu-upgrade-linux-raspi2
  • ubuntu-upgrade-linux-snapdragon

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