Use After Free in Linux Kernel
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 class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Linux Kernel — versions 5.1
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.04
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/108054 (VDB Entry, Third Party Advisory, vdb-entry)
- www.openwall.com/lists/oss-security/2019/04/29/1 (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4069-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4069-2/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4115-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4118-1/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:2703 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11487?
- CVE-2019-11487 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2019-04-23.
- How severe is CVE-2019-11487?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-11487 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.