Description
The evm_update_evmxattr function in security/integrity/evm/evm_crypto.c in the Linux kernel before 3.7.5, when the Extended Verification Module (EVM) is enabled, allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via an attempted removexattr operation on an inode of a sockfs filesystem.
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 | 3.2.39-1 | — |
| Debian 13 | linux | 3.2.39-1 | — |
| Debian 12 | linux | 3.2.39-1 | — |
References
- [oss-security] 20130220 Re: CVE request - Linux kernel: evm: NULL pointer de-reference flaw mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=913266
- https://github.com/torvalds/linux/commit/a67adb997419fb53540d4a4f79c6471c60bc69b6
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a67adb997419fb53540d4a4f79c6471c60bc69b6
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.5