Description
Memory leak in the unshare_userns function in kernel/user_namespace.c in the Linux kernel before 3.10.6 allows local users to cause a denial of service (memory consumption) via an invalid CLONE_NEWUSER unshare call.
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 | 3.10.7-1 | — |
| Debian 13 | linux | 3.10.7-1 | — |
| Debian 12 | linux | 3.10.7-1 | — |
References
- https://github.com/torvalds/linux/commit/6160968cee8b90a5dd95318d716e31d7775c4ef3
- [oss-security] 20130806 Re: CLONE_NEWUSER local DoS mailing-list
- http://twitter.com/grsecurity/statuses/364566062336978944
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.6
- USN-1971-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6160968cee8b90a5dd95318d716e31d7775c4ef3
- USN-1974-1 vendor-advisory