Vulnerability Details : CVE-2019-11487
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.
Vulnerability category: Memory Corruption
Threat overview for CVE-2019-11487
Top countries where our scanners detected CVE-2019-11487
Top open port discovered on systems with this issue
49152
IPs affected by CVE-2019-11487 14,464
Threat actors abusing to this issue?
Yes
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Exploit prediction scoring system (EPSS) score for CVE-2019-11487
Probability of exploitation activity in the next 30 days: 0.11%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 44 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2019-11487
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST |
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2019-11487
-
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-11487
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https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f958d7b528b1b40c44cfda5eabe2d82760d868c3
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
https://github.com/torvalds/linux/commit/15fab63e1e57be9fdb5eec1bbc5916e9825e9acb
fs: prevent page refcount overflow in pipe_buf_get · torvalds/linux@15fab63 · GitHubPatch;Third Party Advisory
-
https://bugs.chromium.org/p/project-zero/issues/detail?id=1752
1752 - Linux: page->_refcount overflow via FUSE with ~140GiB RAM usage - project-zero - MonorailMitigation;Exploit;Third Party Advisory
-
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6b3a707736301c2128ca85ce85fb13f60b5e350a
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
https://usn.ubuntu.com/4118-1/
USN-4118-1: Linux kernel (AWS) vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
[security-announce] openSUSE-SU-2019:1570-1: important: Security updateMailing List;Third Party Advisory
-
https://github.com/torvalds/linux/commit/8fde12ca79aff9b5ba951fce1a2641901b8d8e64
mm: prevent get_user_pages() from overflowing page refcount · torvalds/linux@8fde12c · GitHubPatch;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2020:0174
RHSA-2020:0174 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
[SECURITY] [DLA 1919-1] linux-4.9 security updateMailing List;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20190517-0005/
May 2019 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://usn.ubuntu.com/4145-1/
USN-4145-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html
[SECURITY] [DLA 1919-2] linux-4.9 security updateMailing List;Third Party Advisory
-
http://www.securityfocus.com/bid/108054
Linux Kernel CVE-2019-11487 Multiple Denial of Service VulnerabilitiesThird Party Advisory;VDB Entry
-
https://support.f5.com/csp/article/K14255532
Third Party Advisory
-
https://www.oracle.com/security-alerts/cpuApr2021.html
Oracle Critical Patch Update Advisory - April 2021Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
[security-announce] openSUSE-SU-2019:1571-1: important: Security updateMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
[security-announce] openSUSE-SU-2019:1579-1: important: Security updateMailing List;Third Party Advisory
-
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=88b1a17dfc3ed7728316478fae0f5ad508f50397
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
http://www.openwall.com/lists/oss-security/2019/04/29/1
oss-security - Linux kernel: multiple issuesMailing List;Third Party Advisory
-
https://usn.ubuntu.com/4115-1/
USN-4115-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://github.com/torvalds/linux/commit/6b3a707736301c2128ca85ce85fb13f60b5e350a
Merge branch 'page-refs' (page ref overflow) · torvalds/linux@6b3a707 · GitHubPatch;Third Party Advisory
-
https://usn.ubuntu.com/4069-2/
USN-4069-2: Linux kernel (HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:2703
RHSA-2019:2703 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8fde12ca79aff9b5ba951fce1a2641901b8d8e64
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
https://access.redhat.com/errata/RHSA-2019:2741
RHSA-2019:2741 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://lwn.net/Articles/786044/
Avoiding page reference-count overflows [LWN.net]Exploit;Third Party Advisory
-
https://github.com/torvalds/linux/commit/88b1a17dfc3ed7728316478fae0f5ad508f50397
mm: add 'try_get_page()' helper function · torvalds/linux@88b1a17 · GitHubPatch;Third Party Advisory
-
https://usn.ubuntu.com/4069-1/
USN-4069-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://github.com/torvalds/linux/commit/f958d7b528b1b40c44cfda5eabe2d82760d868c3
mm: make page ref count overflow check tighter and more explicit · torvalds/linux@f958d7b · GitHubPatch;Third Party Advisory
-
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=15fab63e1e57be9fdb5eec1bbc5916e9825e9acb
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
Products affected by CVE-2019-11487
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.1:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.1:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.1:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.1:rc4:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*