#VU30602 Memory leak in Linux kernel - CVE-2019-19045

Vulnerability identifier: #VU30602

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19045

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the mlx5_fpga_conn_create_cq() function in drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c in the Linux kernel before 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering mlx5_vector2eqn() failures, aka CID-c8c2a057fdc7. A remote attacker can perform a denial of service attack.

Mitigation
Update to version 5.3.11.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
https://github.com/torvalds/linux/commit/c8c2a057fdc7de1cd16f4baa51425b932a42eb39
https://security.netapp.com/advisory/ntap-20191205-0001/
https://usn.ubuntu.com/4225-1/
https://usn.ubuntu.com/4225-2/
https://usn.ubuntu.com/4226-1/
https://usn.ubuntu.com/4227-1/
https://usn.ubuntu.com/4227-2/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.