| Name | CVE-2018-20856 |
| Description | An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
| References | DLA-1885-1, DSA-4497-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.269-1 | fixed | |
| bullseye | 5.10.158-2 | fixed | |
| bullseye (security) | 5.10.162-1 | fixed | |
| bookworm | 6.1.15-1 | fixed | |
| sid | 6.1.20-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | jessie | (not affected) | |||
| linux | source | stretch | 4.9.168-1+deb9u5 | DSA-4497-1 | ||
| linux | source | (unstable) | 4.18.8-1 | |||
| linux-4.9 | source | jessie | 4.9.168-1+deb9u5~deb8u1 | DLA-1885-1 |
[jessie] - linux <not-affected> (Vulnerability introduced later)
Fixed by: https://git.kernel.org/linus/54648cf1ec2d7f4b6a71767799c45676a138ca24