CVE-2012-4461
Description
The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that use qemu userspace without XSAVE, allows local users to cause a denial of service (kernel OOPS) by using the KVM_SET_SREGS ioctl to set the X86_CR4_OSXSAVE bit in the guest cr4 register, then calling the KVM_RUN ioctl.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2012-4461 NameCVE-2012-4461 DescriptionThe KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that use qemu userspace without XSAVE, allows local users to cause a denial of service (kernel OOPS) by using the KVM_SET_SREGS ioctl to set the X86_CR4_OSXSAVE bit in the guest cr4 register, then calling the KVM_RUN ioctl. SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc,…
CVE-2012-4461
| Name | CVE-2012-4461 |
| Description | The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that use qemu userspace without XSAVE, allows local users to cause a denial of service (kernel OOPS) by using the KVM_SET_SREGS ioctl to set the X86_CR4_OSXSAVE bit in the guest cr4 register, then calling the KVM_RUN ioctl. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-2668-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | bullseye | 5.10.223-1 | fixed |
| bullseye (security) | 5.10.257-1 | fixed | |
| bookworm | 6.1.170-3 | fixed | |
| bookworm (security) | 6.1.174-1 | fixed | |
| trixie | 6.12.86-1 | fixed | |
| trixie (security) | 6.12.90-2 | fixed | |
| forky | 7.0.9-1 | fixed | |
| sid | 7.0.10-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | (unstable) | 3.2.35-1 | |||
| linux-2.6 | source | squeeze | 2.6.32-48squeeze3 | DSA-2668-1 | ||
| linux-2.6 | source | (unstable) | (unfixed) |
OS impact
Linux kernel Affected 9 releases
| Version | Status | Fixed in |
|---|---|---|
| 3.6.7 | Affected | — |
| 3.6.6 | Affected | — |
| 3.6.5 | Affected | — |
| 3.6.4 | Affected | — |
| 3.6.3 | Affected | — |
| 3.6.2 | Affected | — |
| 3.6.1 | Affected | — |
| 3.6 | Affected | — |
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.2.35-1 |
| sid | Fixed | 3.2.35-1 |
| forky | Fixed | 3.2.35-1 |
| bullseye | Fixed | 3.2.35-1 |
| bookworm | Fixed | 3.2.35-1 |
References
- http://article.gmane.org/gmane.comp.emulators.kvm.devel/100742
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git%3Ba=commit%3Bh=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
- http://rhn.redhat.com/errata/RHSA-2013-0223.html
- http://rhn.redhat.com/errata/RHSA-2013-0882.html
- http://secunia.com/advisories/51160
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.6.9
- http://www.openwall.com/lists/oss-security/2012/11/06/14
- http://www.securityfocus.com/bid/56414
- https://bugzilla.redhat.com/show_bug.cgi?id=862900
- https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
- https://security-tracker.debian.org/tracker/CVE-2012-4461
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.