ArchLinux: 201811-1: linux: denial of service
Summary
In the Linux kernel 4.14.x before 4.14.75 and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out- of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.
Resolution
Upgrade to 4.18.13.arch1-1.
# pacman -Syu "linux>=4.18.13.arch1-1"
The problem has been fixed upstream in version 4.18.13.arch1.
References
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.13 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.75 https://bugs.chromium.org/p/project-zero/issues/detail?id=1686 https://seclists.org/oss-sec/2018/q4/69 https://security.archlinux.org/CVE-2018-18445
Workaround
None.