Description
The sisfb_ioctl function in drivers/video/sis/sis_main.c in the Linux kernel before 2.6.36-rc6 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via an FBIOGET_VBLANK ioctl 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 5.0 | linux-2.6 | 2.6.26-26lenny1 | DSA-2126-1 |
Advisories 1
- DSA-2126-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20100925 CVE request: multiple kernel stack memory disclosures mailing-list
- 42778 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fd02db9de73faebc51240619c7c7f99bee9f65c7
- 43810 vdb-entry
- 42801 third-party-advisory
- SUSE-SA:2011:002 vendor-advisory
- [oss-security] 20101006 Re: CVE request: multiple kernel stack memory disclosures mailing-list
- SUSE-SA:2011:001 vendor-advisory
- SUSE-SA:2011:007 vendor-advisory
- SUSE-SA:2010:060 vendor-advisory
- ADV-2011-0298 vdb-entry
- MDVSA-2011:051 vendor-advisory
- [oss-security] 20101006 Re: CVE request: multiple kernel stack memory disclosures mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=648665
- ADV-2011-0012 vdb-entry
- [oss-security] 20101025 Re: CVE request: multiple kernel stack memory disclosures mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.36/ChangeLog-2.6.36-rc6
- DSA-2126 vendor-advisory