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CVE-2019-15239

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2020-0027-01
Posted Jan 6, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0027-01 - This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-14821, CVE-2019-15239
SHA-256 | 7d43ed229edcdb9df3a89726037e050904218c185ce8befb0eee5fe730d5458c
Red Hat Security Advisory 2019-3978-01
Posted Nov 26, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3978-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-14821, CVE-2019-15239
SHA-256 | 2e22aead63d5c2a4d32dc397e1b73d57dd240b6705ba813c44df31f6111d50b2
Red Hat Security Advisory 2019-3979-01
Posted Nov 26, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3979-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include null pointer and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-14821, CVE-2019-15239
SHA-256 | 3f7932f4deb3df7af3b999b13ede29fdfcd5523a78d33407a216349cad3b9847
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