Memory leak in Linux kernel - CVE-2019-19079

Vulnerability identifier: #VU24383

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-19079

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before 5.3 allows a local user to cause a denial of service (memory consumption).

Linux kernel
Ubuntu
linux-gcp (Ubuntu package)
linux-oracle-5.0 (Ubuntu package)
linux-gke-5.0 (Ubuntu package)
linux-aws-5.0 (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 5.3
linux-gcp (Ubuntu package) - update to 5.0.0-1029.30~18.04.1
linux-oracle-5.0 (Ubuntu package) - update to 5.0.0-1010.15~18.04.1
linux-gke-5.0 (Ubuntu package) - update to 5.0.0-1029.30~18.04.1
linux-aws-5.0 (Ubuntu package) - update to 5.0.0-1024.27~18.04.1

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3
• https://github.com/torvalds/linux/commit/a21b7f0cff1906a93a0130b74713b15a0b36481d

• Denial of service in Linux kernel
• Ubuntu update for linux-aws-5.0, linux-gcp, linux-gke-5.0 and more