CVE-2020-16119
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.43% probability · 37th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · canonical/ubuntu linux · debian/debian linux
- Source
- security@ubuntu.com
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695Patch, Third Party Advisory
- https://launchpad.net/bugs/1883840Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlThird Party Advisory
- https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
- https://security.netapp.com/advisory/ntap-20210304-0006/Third Party Advisory
- https://ubuntu.com/USN-4576-1Third Party Advisory
- https://ubuntu.com/USN-4577-1Third Party Advisory
- https://ubuntu.com/USN-4578-1Third Party Advisory
- https://ubuntu.com/USN-4579-1Third Party Advisory
- https://ubuntu.com/USN-4580-1Third Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
- https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695Patch, Third Party Advisory
- https://launchpad.net/bugs/1883840Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlThird Party Advisory
- https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
- https://security.netapp.com/advisory/ntap-20210304-0006/Third Party Advisory
- https://ubuntu.com/USN-4576-1Third Party Advisory
- https://ubuntu.com/USN-4577-1Third Party Advisory
- https://ubuntu.com/USN-4578-1Third Party Advisory
- https://ubuntu.com/USN-4579-1Third Party Advisory
- https://ubuntu.com/USN-4580-1Third Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.