CVE-2019-11487 (NVD)

2019-04-23

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.

Products Ubuntu_linux, Debian_linux, Linux_kernel
Type Use After Free (CWE-416)
First patch - None (likely due to unavailable code)
Patches • https://github.com/torvalds/linux/commit/88b1a17dfc3ed7728316478fae0f5ad508f50397
• https://github.com/torvalds/linux/commit/15fab63e1e57be9fdb5eec1bbc5916e9825e9acb
• https://github.com/torvalds/linux/commit/f958d7b528b1b40c44cfda5eabe2d82760d868c3
• https://github.com/torvalds/linux/commit/6b3a707736301c2128ca85ce85fb13f60b5e350a
• https://github.com/torvalds/linux/commit/8fde12ca79aff9b5ba951fce1a2641901b8d8e64
Links • https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
• https://www.oracle.com/security-alerts/cpuApr2021.html
• https://security.netapp.com/advisory/ntap-20190517-0005/
• https://access.redhat.com/errata/RHSA-2019:2703
• https://usn.ubuntu.com/4145-1/