title: DCCP CCID structure use-after-free
description: Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.
problem types: CWE-416 Use After Free
affected:
{
product: Linux kernel
vendor: Canonical
versions:
lessThan: 5.4.0-51.56, status: affected, version: 5.4 kernel, versionType: custom
lessThan: 5.3.0-68.63, status: affected, version: 5.3 kernel, versionType: custom
lessThan: 4.15.0-121.123, status: affected, version: 4.15 kernel, versionType: custom
lessThan: 4.4.0-193.224, status: affected, version: 4.4 kernel, versionType: custom
lessThan: 3.13.0.182.191, status: affected, version: 3.13 kernel, versionType: custom
lessThan: 3.2.0-149.196, status: affected, version: 3.2 kernel, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 6.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
version: 3.1
]