Resource exhaustion in Linux kernel

Vulnerability identifier: #VU18946

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-11478

CWE-ID: CWE-400

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 denial of service (DoS) attack.

The vulnerability exists due to an error when processing TCP Selective Acknowledgment (SACK) sequences within the Linux kernel TCP retransmission queue implementation in tcp_fragment. A remote non-authenticated attacker can send specially crafted network traffic to the affected system and perform a denial of service (DoS) attack.

Mitigation

Update your kernel to the latest version.

Vulnerable software versions

Linux kernel: 4.4.0 - 4.4.188, 4.9 - 4.9.188, 4.14 - 4.19.61, 5.0 - 5.0.21, 5.1 rc1 - 5.1.21, 5.2 - 5.2.15

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.

#VU18946 Resource exhaustion in Linux kernel - CVE-2019-11478

Q & A

Latest bulletins with this vulnerability