Memory leak in Linux kernel

1) Memory leak

EUVDB-ID: #VU28413

Risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-19076

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the nfp_abm_u32_knode_replace() function in drivers/net/ethernet/netronome/nfp/abm/cls.c in the Linux kernel before 5.3.6 allows attackers to cause a denial of service (memory consumption), aka CID-78beef629fd9. NOTE: This has been argued as not a valid vulnerability. The upstream commit 78beef629fd9 was reverted. A remote attacker can perform a denial of service attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: 5.0 - 5.5.19

External links

http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.22
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.6
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6

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.