CVE-2020-29372
Published: 28 November 2020
An issue was discovered in do_madvise in mm/madvise.c in the Linux kernel before 5.6.8. There is a race condition between coredump operations and the IORING_OP_MADVISE implementation, aka CID-bc0c4d1e176e.
From the Ubuntu Security Team
Jann Horn discovered that a race condition existed in the madvise implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash).
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-16.19)
|
| focal |
Not vulnerable
(5.4.0-9.12)
|
|
| groovy |
Not vulnerable
(5.4.0-26.30)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.2.0-16.19)
|
|
|
Patches: Introduced by c1ca757bd6f4632c510714631ddcc2d13030fe1e |
||
|
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1001.1)
|
| focal |
Not vulnerable
(5.4.0-1005.5)
|
|
| groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.4.0-1001.10)
|
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-aws-5.3)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-aws-5.4)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1018.18~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-azure-5.3)
|
| focal |
Not vulnerable
(5.4.0-1006.6)
|
|
| groovy |
Not vulnerable
(5.4.0-1010.10)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.11.0-1009.9)
|
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1082.92)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-azure-5.4)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1020.20~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-azure-5.3)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-dell300x Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1005.8)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-gcp-5.3)
|
| focal |
Not vulnerable
(5.4.0-1005.5)
|
|
| groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.10.0-1004.4)
|
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1071.81)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-gcp-5.4)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.2)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-gcp-5.3)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was pending)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support, was needed)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.3 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.3.0-1011.12~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1025.25~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gkeop Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.4.0-1008.9)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-gkeop-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1001.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Ignored
(replaced by linux-hwe-5.4)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.8.0-36.36~16.04.1)
|
|
|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-37.41~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe-5.8 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.8.0-23.24~20.04.1)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-hwe-5.4)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Ignored
(superseded by linux-hwe)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
| focal |
Not vulnerable
(5.4.0-1004.4)
|
|
| groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.4.0-1004.9)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needed)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
linux-oem-5.10 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.10.0-1008.9)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Released
(5.6.0-1010.10)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
| focal |
Not vulnerable
(5.4.0-1005.5)
|
|
| groovy |
Not vulnerable
(5.4.0-1009.9)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-oracle-5.3)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.3 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(superseded by linux-oracle-5.4)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.4.0-1007.7)
|
|
| groovy |
Not vulnerable
(5.4.0-1008.8)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1013.13~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-1005.5)
|
| focal |
Ignored
(replaced by linux-raspi)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.2.0-1013.19)
|
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.3.0-1017.19~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-riscv Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Ignored
(end of life, was needed)
|
|
| groovy |
Not vulnerable
(5.4.0-24.28)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Does not exist
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.4.0-1077.82)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.7~rc3)
|
|
| xenial |
Not vulnerable
(4.4.0-1013.15)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.7 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
- https://git.kernel.org/linus/bc0c4d1e176eeb614dc8734fc3ace34292771f11
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2029
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.8
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0c4d1e176eeb614dc8734fc3ace34292771f11
- https://www.cve.org/CVERecord?id=CVE-2020-29372
- NVD
- Launchpad
- Debian