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CVE-2019-11487

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-4069-2
Posted Jul 31, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4069-2 - USN-4069-1 fixed vulnerabilities in the Linux kernel for Ubuntu 19.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 19.04 for Ubuntu 18.04 LTS. It was discovered that an integer overflow existed in the Linux kernel when reference counting pages, leading to potential use-after-free issues. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-11487, CVE-2019-11599, CVE-2019-11833, CVE-2019-11884
MD5 | eed12995fb3ecba8be58c706282a29f2
Ubuntu Security Notice USN-4069-1
Posted Jul 24, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4069-1 - It was discovered that an integer overflow existed in the Linux kernel when reference counting pages, leading to potential use-after-free issues. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Jann Horn discovered that a race condition existed in the Linux kernel when performing core dumps. A local attacker could use this to cause a denial of service or expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-11487, CVE-2019-11599, CVE-2019-11833, CVE-2019-11884
MD5 | 6df771797de75dc230e8feb33ae00aae
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