Description
Memory leak in drivers/media/video/videobuf-core.c in the videobuf subsystem in the Linux kernel 2.6.x through 4.x allows local users to cause a denial of service (memory consumption) by leveraging /dev/video access for a series of mmap calls that require new allocations, a different vulnerability than CVE-2007-6761. NOTE: as of 2016-06-18, this affects only 11 drivers that have not been updated to use videobuf2 instead of videobuf.
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 | No fix yet | — |
| Debian 13 | linux | No fix yet | — |
| Debian 12 | linux | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | linux +1 | No fix yet | — |
References
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=827340
- [oss-security] 20150208 Re: kernel: v4l: videobuf: hotfix a bug on multiple calls to mmap() - Linux kernel mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=620629
- http://linuxtv.org/irc/v4l/index.php?date=2010-07-29
- https://bugzilla.kernel.org/show_bug.cgi?id=120571