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HIGH

CVE-2019-11487

CVSS v3

7.8

HIGH

EPSS Score

0.7 %

exploit probability, as of 2026-10-18

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2019-11487 Red Hat Product Security705 products fixed

    kernel: Count overflow in FUSE request leading to use-after-free issues.

  • RHSA-2020:4182 Red Hat Product Security93 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2020:3266 Red Hat Product Security16 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2020:3230 Red Hat Product Security94 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2020:2851 Red Hat Product Security111 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2020:0834 Red Hat Product Security174 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

4 more advisories

Full record on NVD

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.

Technical details

Published
2019-04-23

Frequently asked questions

What is 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.

Is CVE-2019-11487 actively exploited?

Active exploitation of CVE-2019-11487 has not been confirmed. Its EPSS score was 0.7% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-11487?

CVE-2019-11487 has a CVSS v3 base score of 7.8 (HIGH severity).

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