CVE-2019-11487 — HIGH (7.8)

Vulnerability 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.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Linux	Linux Kernel	< 4.4.216
Debian	Debian Linux	8.0
Canonical	Ubuntu Linux	16.04

Related Weaknesses (CWE)

CWE-416

References

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.htmlMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/04/29/1Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/108054Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:2703Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2741Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0174Third Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=1752ExploitMitigationThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=15fabPatchVendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6b3a7PatchVendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=88b1aPatchVendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8fde1PatchVendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f958dPatchVendor Advisory
https://github.com/torvalds/linux/commit/15fab63e1e57be9fdb5eec1bbc5916e9825e9acPatchThird Party Advisory

FAQ

What is CVE-2019-11487?

CVE-2019-11487 is a vulnerability with a CVSS score of 7.8 (HIGH). 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/s...

How severe is CVE-2019-11487?

CVE-2019-11487 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-11487?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Canonical Ubuntu Linux.