CVE-2019-11487
Published: 23 April 2019
The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can occur with FUSE requests.
From the Ubuntu Security Team
It was discovered that an integer overflow existed in the Linux kernel when reference counting pages, leading to potential use-after-free issues. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
Notes
| Author | Note |
|---|---|
| tyhicks | Requires >= 140 GiB of RAM which is rare |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| xenial |
Released
(4.4.0-165.193)
|
|
| bionic |
Released
(4.15.0-60.67)
|
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-21.22)
|
|
| eoan |
Not vulnerable
(5.2.0-8.9)
|
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| xenial |
Ignored
(end of life)
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Ignored
(was needed ESM criteria)
|
|
| xenial |
Released
(4.4.0-1095.106)
|
|
| bionic |
Released
(4.15.0-1047.49)
|
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-1011.12)
|
|
| eoan |
Not vulnerable
(5.0.0-1011.12)
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| xenial |
Released
(4.15.0-1047.49~16.04.1)
|
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Not vulnerable
(5.0.0-1021.24~18.04.1)
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.1~rc5)
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Not vulnerable
(5.3.0-1007.8~18.04.1)
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
disco |
Does not exist
|
| bionic |
Not vulnerable
(5.3.0-1008.9~18.04.1)
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1014.14~18.04.1)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-1012.12)
|
|
| eoan |
Not vulnerable
(5.0.0-1012.12)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.15.0-1056.61)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1014.14~18.04.1)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.15.0-1056.61)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Ignored
(end of life, was needs-triage)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1042.45)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-1011.11)
|
|
| eoan |
Not vulnerable
(5.0.0-1011.11)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.15.0-1041.43)
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1042.45)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1041.43)
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.0.0-1011.11~18.04.1)
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-23.24~18.04.1)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.15.0-60.67~16.04.1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was pending)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.15.0-60.67~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1043.43)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-1011.12)
|
|
| eoan |
Not vulnerable
(5.0.0-1011.12)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.4.0-1059.66)
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Ignored
(end of life, was ignored)
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Ignored
(end of life, was ignored)
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Ignored
(end of life, was ignored)
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1056.65)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Ignored
(end of life, was pending)
|
|
| eoan |
Released
(4.15.0-1059.68)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-oem-5.4 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1015.16)
|
| disco |
Ignored
(end of life, was pending)
|
|
| eoan |
Released
(5.0.0-1018.20)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1022.25)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-1004.8)
|
|
| eoan |
Not vulnerable
(5.3.0-1002.2)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.15.0-1022.25~16.04.1)
|
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.0.0-1007.12~18.04.1)
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1044.47)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Released
(5.0.0-1013.13)
|
|
| eoan |
Not vulnerable
(5.0.0-1013.13)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.4.0-1123.132)
|
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.3.0-1017.19~18.04.1)
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1062.69)
|
| cosmic |
Does not exist
|
|
| disco |
Released
(5.0.0-1017.18)
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.1~rc5)
|
|
| xenial |
Released
(4.4.0-1127.135)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11487
- https://lwn.net/Articles/786044/
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=15fab63e1e57be9fdb5eec1bbc5916e9825e9acb
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6b3a707736301c2128ca85ce85fb13f60b5e350a
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=88b1a17dfc3ed7728316478fae0f5ad508f50397
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8fde12ca79aff9b5ba951fce1a2641901b8d8e64
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f958d7b528b1b40c44cfda5eabe2d82760d868c3
- https://ubuntu.com/security/notices/USN-4069-1
- https://ubuntu.com/security/notices/USN-4069-2
- https://ubuntu.com/security/notices/USN-4115-1
- https://ubuntu.com/security/notices/USN-4118-1
- https://ubuntu.com/security/notices/USN-4145-1
- NVD
- Launchpad
- Debian