| Name | CVE-2016-8655 |
| Description | Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cause a denial of service (use-after-free) by leveraging the CAP_NET_RAW capability to change a socket version, related to the packet_set_ring and packet_setsockopt functions. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-772-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| linux (PTS) | buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.304-1 | fixed |
| bullseye | 5.10.209-2 | fixed |
| bullseye (security) | 5.10.205-2 | fixed |
| bookworm | 6.1.76-1 | fixed |
| bookworm (security) | 6.1.85-1 | fixed |
| trixie | 6.6.15-2 | fixed |
| sid | 6.7.9-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| linux | source | wheezy | 3.2.84-1 | | DLA-772-1 | |
| linux | source | jessie | 3.16.39-1 | | | |
| linux | source | (unstable) | 4.8.15-1 | | | |
Notes
http://seclists.org/oss-sec/2016/q4/607
Introduced by: https://git.kernel.org/linus/f6fb8f100b807378fda19e83e5ac6828b638603a (v3.2-rc1)
Fixed by: https://git.kernel.org/linus/84ac7260236a49c79eede91617700174c2c19b0c (v4.9-rc8)
Non-privileged user namespaces disabled by default, only exploitable by arbitrary user if sysctl kernel.unprivileged_userns_clone=1