Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit f070ef2ac66716357066b683fb0baf55f8191a2e.
Published 2019-06-19 00:15:13
Updated 2024-02-27 21:04:18
View at NVD,   CVE.org
Vulnerability category: Denial of service

Threat overview for CVE-2019-11478

Top countries where our scanners detected CVE-2019-11478
Top open port discovered on systems with this issue 53
IPs affected by CVE-2019-11478 858,710
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2019-11478!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2019-11478

Probability of exploitation activity in the next 30 days: 96.72%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2019-11478

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST
7.5
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST
5.3
MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.9
1.4
Canonical Ltd.

CWE ids for CVE-2019-11478

  • The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
    Assigned by: nvd@nist.gov (Primary)
  • The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
    Assigned by: security@ubuntu.com (Secondary)

References for CVE-2019-11478

Products affected by CVE-2019-11478

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