CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
99.7%
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.
Author | Note |
---|---|
tyhicks | This vulnerability results in exhausted CPU resources on kernels < 4.15 This vulnerability results in exhausted kernel memory on kernels >= 4.15 |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < 4.15.0-52.56 | UNKNOWN |
ubuntu | 18.10 | noarch | linux | < 4.18.0-22.23 | UNKNOWN |
ubuntu | 19.04 | noarch | linux | < 5.0.0-17.18 | UNKNOWN |
ubuntu | 14.04 | noarch | linux | < 3.13.0-171.222 | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < 4.4.0-151.178 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < 4.15.0-1041.43 | UNKNOWN |
ubuntu | 18.10 | noarch | linux-aws | < 4.18.0-1018.20 | UNKNOWN |
ubuntu | 19.04 | noarch | linux-aws | < 5.0.0-1008.8 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1046.50 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1085.96 | UNKNOWN |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
99.7%