kernel: thp: __split_huge_page() mapcount != page_mapcount BUG_ON()
Published May 17, 2012
5.2
MEDIUMCVSS 2.0
EPSS 0.60%
Description
The Linux kernel before 3.3.1, when KVM is used, allows guest OS users to cause a denial of service (host OS crash) by leveraging administrative access to the guest OS, related to the pmd_none_or_clear_bad function and page faults for huge pages.
Affected products
No data.
- ≤ 3.3
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-220.23.1.el6
Fixed · RHSA-2012:0743
Red Hat Enterprise Linux 6.1 EUS - Server Only
kernel-0:2.6.32-131.29.1.el6
Fixed · RHSA-2012:1042
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-220.23.1.el6 | Fixed | RHSA-2012:0743 |
| Red Hat Enterprise Linux 6.1 EUS - Server Only | kernel-0:2.6.32-131.29.1.el6 | Fixed | RHSA-2012:1042 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:A/AC:M/Au:S/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.60% (0.00600) | 46.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.61% (0.00607) | 44.17th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.26% (0.00264) | 47.78th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.28% (0.01282) | 67.79th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.55% (0.01547) | 74.40th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (14)
- http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075781.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html vendor-advisoryx_refsource_SUSE
- http://marc.info/?l=bugtraq&m=139447903326211&w=2 vendor-advisoryx_refsource_HP
- http://rhn.redhat.com/errata/RHSA-2012-0743.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/48404 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/48898 third-party-advisoryx_refsource_SECUNIA
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2012/03/15/7 mailing-listx_refsource_MLIST
- http://www.securitytracker.com/id?1027084 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2012-1179 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=803793 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/4a1d704194a441bf83c636004a479e01360ec850 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2012-1179
- https://www.cve.org/CVERecord?id=CVE-2012-1179
Change history (0)
No recorded changes yet.