Date: Sun, 5 May 2019 15:18:23 +0200 From: Greg KH <greg@...ah.com> To: oss-security@...ts.openwall.com Subject: Re: CVE-2019-11683: "GRO packet of death" issue in the Linux kernel On Thu, May 02, 2019 at 07:14:30PM +0200, Andrey Konovalov wrote: > Hi, > > syzbot has reported a remotely triggerable memory corruption in the > Linux kernel. It's been introduced quite recently in e20cf8d3f1f7 > ("udp: implement GRO for plain UDP sockets.") and only affects the 5.0 > (stable) release (so the name is a bit overhyped :). > > CVE-2019-11683 description: > > udp_gro_receive_segment in net/ipv4/udp_offload.c in the Linux kernel > 5.x through 5.0.11 allows remote attackers to cause a denial of > service (slab-out-of-bounds memory corruption) or possibly have > unspecified other impact via UDP packets with a 0 payload, because of > mishandling of padded packets, aka the "GRO packet of death" issue. > > Fix (not yet upstream): > > https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=4dd2b82d5adfbe0b1587ccad7a8f76d826120f37 Now fixed in the 5.0.13 kernel release. thanks, greg k-h
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