CVE-2020-12659
Publication date 5 May 2020
Last updated 24 July 2024
Ubuntu priority
An issue was discovered in the Linux kernel before 5.6.7. xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write (by a user with the CAP_NET_ADMIN capability) because of a lack of headroom validation.
From the Ubuntu Security Team
Bui Quang Minh discovered that the XDP socket implementation in the Linux kernel did not properly validate meta-data passed from user space, leading to an out-of-bounds write vulnerability. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| linux | 20.04 LTS focal |
Fixed 5.4.0-37.41
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
|
| linux-aws | 20.04 LTS focal |
Fixed 5.4.0-1015.15
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
|
| linux-aws-5.0 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-aws-5.3 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-1023.25~18.04.1
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-aws-5.4 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-aws-hwe | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release | |
| linux-azure | 20.04 LTS focal |
Fixed 5.4.0-1016.16
|
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
|
| linux-azure-4.15 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-azure-5.3 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-1028.29~18.04.1
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-azure-5.4 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-azure-edge | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gcp | 20.04 LTS focal |
Fixed 5.4.0-1015.15
|
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release | |
| linux-gcp-4.15 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gcp-5.3 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-1026.28~18.04.1
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gcp-5.4 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gcp-edge | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gke-4.15 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gke-5.0 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.0.0-1042.43
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-gke-5.3 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-1026.28~18.04.1
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-hwe | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-59.53~18.04.1
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release | |
| linux-hwe-5.4 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-hwe-edge | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial | Ignored | |
| 14.04 LTS trusty | Not in release | |
| linux-kvm | 20.04 LTS focal |
Fixed 5.4.0-1015.15
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release | |
| linux-lts-trusty | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-lts-xenial | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty |
Not affected
|
|
| linux-oem | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Ignored | |
| 14.04 LTS trusty | Not in release | |
| linux-oem-5.6 | 20.04 LTS focal |
Fixed 5.6.0-1010.10
|
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-oem-osp1 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.0.0-1059.64
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-oracle | 20.04 LTS focal |
Fixed 5.4.0-1015.15
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release | |
| linux-oracle-5.0 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-oracle-5.3 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-1024.26~18.04.1
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-oracle-5.4 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-raspi | 20.04 LTS focal |
Fixed 5.4.0-1012.12
|
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-raspi-5.4 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-raspi2 | 20.04 LTS focal | Ignored |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release | |
| linux-raspi2-5.3 | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Fixed 5.3.0-1027.29~18.04.1
|
|
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-riscv | 20.04 LTS focal |
Fixed 5.4.0-27.31
|
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| linux-snapdragon | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.7 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-4387-1
- Linux kernel vulnerabilities
- 10 June 2020
- USN-4389-1
- Linux kernel vulnerabilities
- 10 June 2020
- USN-4388-1
- Linux kernel vulnerabilities
- 9 June 2020
Other references
- https://git.kernel.org/linus/99e3a236dd43d06c65af0a2ef9cb44306aef6e02 (5.7-rc2)
- https://bugzilla.kernel.org/show_bug.cgi?id=207225
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.7
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=99e3a236dd43d06c65af0a2ef9cb44306aef6e02
- https://github.com/torvalds/linux/commit/99e3a236dd43d06c65af0a2ef9cb44306aef6e02
- https://www.cve.org/CVERecord?id=CVE-2020-12659