Description
A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | kernel | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.18.6-1 | — |
| Debian 13 | linux | 4.18.6-1 | — |
| Debian 12 | linux | 4.18.6-1 | — |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14656
- 1041804 vdb-entry
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4
- https://lore.kernel.org/lkml/20180828154901.112726-1-jannh%40google.com/T/
- https://seclists.org/oss-sec/2018/q4/9
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1650