Description
Multiple integer overflows in Alchemy LCD frame-buffer drivers in the Linux kernel before 3.12 allow local users to create a read-write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted mmap operations, related to the (1) au1100fb_fb_mmap function in drivers/video/au1100fb.c and the (2) au1200fb_fb_mmap function in drivers/video/au1200fb.c.
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 | 3.11.8-1 | — |
| Debian 13 | linux | 3.11.8-1 | — |
| Debian 12 | linux | 3.11.8-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze5 | DSA-2906-1 |
Advisories 1
- DSA-2906-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- openSUSE-SU-2014:0247 vendor-advisory
- USN-2073-1 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7314e613d5ff9f0934f7a0f74ed7973b903315d1
- https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.12.bz2
- USN-2076-1 vendor-advisory
- USN-2069-1 vendor-advisory
- USN-2070-1 vendor-advisory
- USN-2036-1 vendor-advisory
- USN-2066-1 vendor-advisory
- USN-2071-1 vendor-advisory
- [oss-security] 20131104 Re: some unstracked linux kernel security fixes mailing-list
- USN-2074-1 vendor-advisory
- https://github.com/torvalds/linux/commit/7314e613d5ff9f0934f7a0f74ed7973b903315d1
- USN-2068-1 vendor-advisory
- openSUSE-SU-2014:0204 vendor-advisory
- USN-2037-1 vendor-advisory
- USN-2072-1 vendor-advisory
- openSUSE-SU-2014:0205 vendor-advisory
- USN-2075-1 vendor-advisory
- USN-2067-1 vendor-advisory