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 breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected products
- Canonical / Linux kernel5.4 kernel – 5.4.0-51.56
- Canonical / Linux kernel5.3 kernel – 5.3.0-68.63
- Canonical / Linux kernel4.15 kernel – 4.15.0-121.123
- Canonical / Linux kernel4.4 kernel – 4.4.0-193.224
- Canonical / Linux kernel3.13 kernel – 3.13.0.182.191
- Canonical / Linux kernel3.2 kernel – 3.2.0-149.196
References
- MISChttps://launchpad.net/bugs/1883840
- VENDOR_ADVISORYhttps://ubuntu.com/USN-4576-1
- VENDOR_ADVISORYhttps://ubuntu.com/USN-4577-1
- VENDOR_ADVISORYhttps://ubuntu.com/USN-4578-1
- VENDOR_ADVISORYhttps://ubuntu.com/USN-4579-1
- VENDOR_ADVISORYhttps://ubuntu.com/USN-4580-1
- MISChttps://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
- MISChttps://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695
- MISChttps://security.netapp.com/advisory/ntap-20210304-0006/
- VENDOR_ADVISORYhttps://www.debian.org/security/2021/dsa-4978
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2021/12/msg00012.html