CVE-2012-4461
published 2013-01-22CVE-2012-4461: 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…
PriorityP48low1.9CVSS 2.0
AVLACMAuNCNINAP
EPSS
0.36%
28.6th percentile
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.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 3.2.35-1 (bookworm) | linux 3.2.35-1 (bookworm) |
| linux | linux_kernel | <= 3.6.8 | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
| linux | linux_kernel | >= 0 < 3.2.35-1 | 3.2.35-1 |
CVSS provenance
nvdv2.01.9LOWAV:L/AC:M/Au:N/C:N/I:N/A:P
osv1.9LOW
vendor_ubuntu4.9MEDIUM
vendor_debian1.9LOW
vendor_redhat1.9LOW
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Ubuntu
Linux kernel (Quantal HWE) regression
vendor_ubuntu·2013-02-01·CVSS 4.9
[MEDIUM] Linux kernel (Quantal HWE) regression
Title: Linux kernel (Quantal HWE) regression
Summary: USN-1704-1 introduced a regression in the Linux kernel.
USN-1704-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated
regression inotify/fanotify stopped working after upgrading. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Brad Spengler discovered a flaw in the Linux kernel's uname system call. An
unprivileged user could exploit this flaw to read kernel stack memory.
(CVE-2012-0957)
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
Dmitry Monakho
Ubuntu
Linux kernel regression
vendor_ubuntu·2013-02-01·CVSS 1.9
[LOW] Linux kernel regression
Title: Linux kernel regression
Summary: USN-1699-1 introduced a regression in the Linux kernel.
USN-1699-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated
regression inotify/fanotify stopped working after upgrading. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE CPU feature. On hosts without the
XSAVE CPU feature, using qemu userspace, an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
A flaw was discovered in the Linux kernel's handling of script execution
when module loading is enabled. A local attacker could exploit this flaw to
cause a leak of kernel stack conten
Ubuntu
Linux kernel regression
vendor_ubuntu·2013-02-01·CVSS 1.9
[LOW] Linux kernel regression
Title: Linux kernel regression
Summary: USN-1696-1 introduced a regression in the Linux kernel.
USN-1696-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated
regression inotify/fanotify stopped working after upgrading. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
A flaw was discovered in the Linux kernel's handling of script execution
when module loading is enabled. A local attacker could exploit this flaw to
cause a leak of kernel stack contents. (CVE
Ubuntu
Linux kernel (Quantal HWE) vulnerabilities
vendor_ubuntu·2013-01-22·CVSS 4.9
CVE-2012-0957 [MEDIUM] Linux kernel (Quantal HWE) vulnerabilities
Title: Linux kernel (Quantal HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Brad Spengler discovered a flaw in the Linux kernel's uname system call. An
unprivileged user could exploit this flaw to read kernel stack memory.
(CVE-2012-0957)
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem
that can expose stale data. An unprivileged user could exploit this flaw to
cause an information leak. (CVE-2012-4508)
A flaw was discovered in the Linux kernel's handling o
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2013-01-18·CVSS 1.9
CVE-2012-4461 [LOW] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
A flaw was discovered in the Linux kernel's handling of script execution
when module loading is enabled. A local attacker could exploit this flaw to
cause a leak of kernel stack contents. (CVE-2012-4530)
Florian Weimer discovered that hypervkvpd, which is distributed in the
Linux kernel, was not correctly validating source addresses of netlink
packets. An untrusted local user can cause a denial of service by causing
hype
Ubuntu
Linux kernel (Oneiric backport) vulnerabilities
vendor_ubuntu·2013-01-15·CVSS 1.9
CVE-2012-4461 [LOW] Linux kernel (Oneiric backport) vulnerabilities
Title: Linux kernel (Oneiric backport) vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
A flaw was discovered in the Linux kernel's handling of script execution
when module loading is enabled. A local attacker could exploit this flaw to
cause a leak of kernel stack contents. (CVE-2012-4530)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new ve
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2013-01-15·CVSS 1.9
CVE-2012-4461 [LOW] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)
A flaw was discovered in the Linux kernel's handling of script execution
when module loading is enabled. A local attacker could exploit this flaw to
cause a leak of kernel stack contents. (CVE-2012-4530)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which
Red Hat
kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
vendor_redhat·2012-11-06·CVSS 1.9
CVE-2012-4461 [LOW] kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
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.
Statement: This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5.
This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6.
This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise MRG 2.
Package: kvm (Red Hat Enterprise Linux 5) - Not affected
Package: realtime-kernel (Red Hat Enterprise MRG 2) - Not affected
Debian
CVE-2012-4461: linux - The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that u...
vendor_debian·2012·CVSS 1.9
CVE-2012-4461 [LOW] CVE-2012-4461: linux - The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that u...
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.
Scope: local
bookworm: resolved (fixed in 3.2.35-1)
bullseye: resolved (fixed in 3.2.35-1)
forky: resolved (fixed in 3.2.35-1)
sid: resolved (fixed in 3.2.35-1)
trixie: resolved (fixed in 3.2.35-1)
GHSA
GHSA-vmj3-p7xv-c3c3: The KVM subsystem in the Linux kernel before 3
ghsa_unreviewed·2022-05-17
CVE-2012-4461 [LOW] GHSA-vmj3-p7xv-c3c3: The KVM subsystem in the Linux kernel before 3
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.
OSV
CVE-2012-4461: The KVM subsystem in the Linux kernel before 3
osv·2013-01-22·CVSS 1.9
CVE-2012-4461 [LOW] CVE-2012-4461: The KVM subsystem in the Linux kernel before 3
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.
Kernel
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
kernel_security·2012-11-12·CVSS 1.9
CVE-2012-4461 [LOW] Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fix from Marcelo Tosatti:
"A correction for user triggerable oops"
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: invalid opcode oops on SET_SREGS with OSXSAVE bit set (CVE-2012-4461)
Kernel
KVM: x86: invalid opcode oops on SET_SREGS with OSXSAVE bit set (CVE-2012-4461)
kernel_security·2012-11-06·CVSS 1.9
CVE-2012-4461 [LOW] KVM: x86: invalid opcode oops on SET_SREGS with OSXSAVE bit set (CVE-2012-4461)
KVM: x86: invalid opcode oops on SET_SREGS with OSXSAVE bit set (CVE-2012-4461)
On hosts without the XSAVE support unprivileged local user can trigger
oops similar to the one below by setting X86_CR4_OSXSAVE bit in guest
cr4 register using KVM_SET_SREGS ioctl and later issuing KVM_RUN
ioctl.
invalid opcode: 0000 [#2] SMP
Modules linked in: tun ip6table_filter ip6_tables ebtable_nat ebtables
...
Pid: 24935, comm: zoog_kvm_monito Tainted: G D 3.2.0-3-686-pae
EIP: 0060:[] EFLAGS: 00210246 CPU: 0
EIP is at kvm_arch_vcpu_ioctl_run+0x92a/0xd13 [kvm]
EAX: 00000001 EBX: 000f387e ECX: 00000000 EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: ef5a0060 ESP: d7c63e70
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process zoog_kvm_monito (pid: 24935, ti=d7c62000 task=ed84a0c0
task.ti=d7c62000)
Stack:
000
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set [fedora-all]
bugzilla·2012-11-20·CVSS 1.9
CVE-2012-4461 [LOW] CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set [fedora-all]
CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when available.
Please note
Bugzilla
CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
bugzilla·2012-10-03·CVSS 1.9
CVE-2012-4461 [LOW] CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
A flaw has been found in the way Linux kernel's KVM subsystem handled vcpu->arch.cr4 X86_CR4_OSXSAVE bit set upon guest enter. On hosts without the XSAVE feature an unprivileged local user could use this flaw to crash the system.
Acknowledgements:
Red Hat would like to thank Jon Howell for reporting this issue.
Discussion:
Statement:
This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5.
This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6.
This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise MRG 2.
---
Public now via http://article.gmane.org/gmane.comp.emulators.kvm.devel/100742
--
http://article.gmane.org/gmane.comp.emulators.kvm.devel/100742http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git%3Ba=commit%3Bh=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.htmlhttp://rhn.redhat.com/errata/RHSA-2013-0223.htmlhttp://rhn.redhat.com/errata/RHSA-2013-0882.htmlhttp://secunia.com/advisories/51160http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.6.9http://www.openwall.com/lists/oss-security/2012/11/06/14http://www.securityfocus.com/bid/56414https://bugzilla.redhat.com/show_bug.cgi?id=862900https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.htmlhttp://article.gmane.org/gmane.comp.emulators.kvm.devel/100742http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git%3Ba=commit%3Bh=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.htmlhttp://rhn.redhat.com/errata/RHSA-2013-0223.htmlhttp://rhn.redhat.com/errata/RHSA-2013-0882.htmlhttp://secunia.com/advisories/51160http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.6.9http://www.openwall.com/lists/oss-security/2012/11/06/14http://www.securityfocus.com/bid/56414https://bugzilla.redhat.com/show_bug.cgi?id=862900https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
2013-01-22
Published