CVE-2019-11487

Public Exploit

Description

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/108054 third party advisory vdb entry
http://www.openwall.com/lists/oss-security/2019/04/29/1 third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html vendor advisory mailing list third party advisory
https://usn.ubuntu.com/4069-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4069-2/ third party advisory vendor advisory
https://usn.ubuntu.com/4115-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4118-1/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2703 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2741 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html third party advisory mailing list
https://usn.ubuntu.com/4145-1/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2020:0174 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20190517-0005/ third party advisory
https://www.oracle.com/security-alerts/cpuApr2021.html third party advisory
https://github.com/torvalds/linux/commit/6b3a707736301c2128ca85ce85fb13f60b5e350a third party advisory patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6b3a707736301c2128ca85ce85fb13f60b5e350a patch vendor advisory
https://github.com/torvalds/linux/commit/15fab63e1e57be9fdb5eec1bbc5916e9825e9acb third party advisory patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=15fab63e1e57be9fdb5eec1bbc5916e9825e9acb patch vendor advisory
https://github.com/torvalds/linux/commit/8fde12ca79aff9b5ba951fce1a2641901b8d8e64 third party advisory patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8fde12ca79aff9b5ba951fce1a2641901b8d8e64 patch vendor advisory
https://github.com/torvalds/linux/commit/88b1a17dfc3ed7728316478fae0f5ad508f50397 third party advisory patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=88b1a17dfc3ed7728316478fae0f5ad508f50397 patch vendor advisory
https://github.com/torvalds/linux/commit/f958d7b528b1b40c44cfda5eabe2d82760d868c3 third party advisory patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f958d7b528b1b40c44cfda5eabe2d82760d868c3 patch vendor advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=1752 mitigation third party advisory exploit
https://lwn.net/Articles/786044/ third party advisory exploit
https://support.f5.com/csp/article/K14255532 third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-11487?
CVE-2019-11487 has been scored as a high severity vulnerability.
How to fix CVE-2019-11487?
To fix CVE-2019-11487, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11487 being actively exploited in the wild?
It is possible that CVE-2019-11487 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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