Arch Linux Security Advisory ASA-201811-1 ========================================= Severity: Low Date : 2018-11-01 CVE-ID : CVE-2018-18445 Package : linux Type : denial of service Remote : No Link : https://security.archlinux.org/AVG-784 Summary ======= The package linux before version 4.18.13.arch1-1 is vulnerable to denial of service. 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. Workaround ========== None. Description =========== 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. Impact ====== A local attacker is able to crash the kernel and leak information using a specially crafted BPF program. References ========== http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b7... 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