Buffer overflow in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via a crafted .fon file, aka "Font Library File Buffer Overrun Vulnerability."
Published Oct 12, 2011
9.3
HIGHCVSS 2.0
EPSS 26.56%
Description
Buffer overflow in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via a crafted .fon file, aka "Font Library File Buffer Overrun Vulnerability."
Affected products
No data.
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- r2
- r2
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No data.
No Red Hat product state for this CVE.
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:N/AC:M/Au:N/C:C/I:C/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 (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 26.56% (0.26558) | 97.96th | v5 (v2026.06.15) |
| Aug 31, 2026 | 26.56% (0.26558) | 97.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 27.77% (0.27772) | 97.83th | v5 (v2026.06.15) |
| Jan 29, 2026 | 49.40% (0.49398) | 97.69th | v4 (v2025.03.14) |
| Dec 28, 2025 | 55.84% (0.55836) | 97.98th | v4 (v2025.03.14) |
| Dec 27, 2025 | 65.83% (0.65829) | 98.46th | v4 (v2025.03.14) |
| Nov 16, 2025 | 55.84% (0.55836) | 97.97th | v4 (v2025.03.14) |
| Oct 28, 2025 | 61.71% (0.61715) | 98.23th | v4 (v2025.03.14) |
| Oct 27, 2025 | 68.45% (0.68455) | 98.55th | v4 (v2025.03.14) |
| Oct 1, 2025 | 61.71% (0.61715) | 98.29th | v4 (v2025.03.14) |
| Sep 2, 2025 | 68.45% (0.68455) | 98.57th | v4 (v2025.03.14) |
| Mar 30, 2025 | 70.74% (0.70736) | 98.59th | v4 (v2025.03.14) |
| Mar 29, 2025 | 81.92% (0.81921) | 98.98th | v4 (v2025.03.14) |
| Mar 17, 2025 | 70.74% (0.70736) | 98.60th | v4 (v2025.03.14) |
| Dec 12, 2024 | 78.39% (0.78386) | 98.36th | v3 (v2023.03.01) |
| Oct 28, 2024 | 78.39% (0.78386) | 98.33th | v3 (v2023.03.01) |
| Jun 1, 2024 | 88.94% (0.88935) | 98.72th | v3 (v2023.03.01) |
| Apr 11, 2024 | 88.40% (0.88398) | 98.64th | v3 (v2023.03.01) |
| Feb 18, 2024 | 90.60% (0.90604) | 98.72th | v3 (v2023.03.01) |
| Dec 24, 2023 | 92.08% (0.92084) | 98.72th | v3 (v2023.03.01) |
| Oct 30, 2023 | 92.64% (0.92639) | 98.71th | v3 (v2023.03.01) |
| Sep 6, 2023 | 93.04% (0.93043) | 98.68th | v3 (v2023.03.01) |
| Mar 8, 2023 | 93.99% (0.93987) | 98.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 94.73% (0.94726) | 98.73th | v3 (v2023.03.01) |
| Mar 6, 2023 | 53.82% (0.53820) | 98.79th | v2 (v2022.01.01) |
| Sep 13, 2022 | 53.82% (0.53820) | 98.71th | v2 (v2022.01.01) |
| Mar 27, 2022 | 59.73% (0.59727) | 98.62th | v2 (v2022.01.01) |
| Feb 4, 2022 | 62.60% (0.62598) | 98.72th | v2 (v2022.01.01) |
References (4)
- http://securityreason.com/securityalert/8473 third-party-advisoryx_refsource_SREASON
- http://www.securitytracker.com/id?1026165 vdb-entryx_refsource_SECTRACK
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-077 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13103 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://securityreason.com/securityalert/8473 | third-party-advisoryx_refsource_SREASON | |
| http://www.securitytracker.com/id?1026165 | vdb-entryx_refsource_SECTRACK | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-077 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13103 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.