Race condition in the HFS vfs sysctl interface in XNU 1228.8.20 and earlier on Apple Mac OS X 10.5.6 and earlier allows local users to cause a denial of service (kernel memory corruption) by simultaneously executing the same HFS_SET_PKG_EXTENSIONS code path in multiple threads, which is problematic because of lack of mutex locking for an unspecified global variable
Published Apr 2, 2009
7.2
HIGHCVSS 2.0
EPSS 0.62%
Description
Race condition in the HFS vfs sysctl interface in XNU 1228.8.20 and earlier on Apple Mac OS X 10.5.6 and earlier allows local users to cause a denial of service (kernel memory corruption) by simultaneously executing the same HFS_SET_PKG_EXTENSIONS code path in multiple threads, which is problematic because of lack of mutex locking for an unspecified global variable.
Affected products
No data.
- ≤ 10.5.6
- 10.0
- 10.0.0
- 10.0.1
- 10.0.2
- 10.0.3
- 10.0.4
- 10.1
- 10.1.0
- 10.1.1
- 10.1.2
- 10.1.3
- 10.1.4
- 10.1.5
- 10.2
- 10.2.0
- 10.2.1
- 10.2.2
- 10.2.3
- 10.2.4
- 10.2.5
- 10.2.6
- 10.2.7
- 10.2.8
- 10.3
- 10.3.0
- 10.3.1
- 10.3.2
- 10.3.3
- 10.3.4
- 10.3.5
- 10.3.6
- 10.3.7
- 10.3.8
- 10.3.9
- 10.4
- 10.4.0
- 10.4.1
- 10.4.2
- 10.4.3
- 10.4.4
- 10.4.5
- 10.4.6
- 10.4.7
- 10.4.8
- 10.4.8
- 10.4.8
- 10.4.8
- 10.4.9
- 10.4.10
- 10.4.11
- 10.5
- 10.5.0
- 10.5.1
- 10.5.2
- 10.5.2
- 10.5.3
- 10.5.4
- 10.5.5
- ≤ 10.5.6
- 10.0
- 10.0.0
- 10.0.1
- 10.0.2
- 10.0.3
- 10.0.4
- 10.1
- 10.1.0
- 10.1.1
- 10.1.2
- 10.1.3
- 10.1.4
- 10.1.5
- 10.2
- 10.2.0
- 10.2.1
- 10.2.2
- 10.2.3
- 10.2.4
- 10.2.5
- 10.2.6
- 10.2.7
- 10.2.8
- 10.3
- 10.3.0
- 10.3.1
- 10.3.2
- 10.3.3
- 10.3.4
- 10.3.5
- 10.3.6
- 10.3.7
- 10.3.8
- 10.3.9
- 10.4
- 10.4.0
- 10.4.1
- 10.4.2
- 10.4.3
- 10.4.4
- 10.4.5
- 10.4.6
- 10.4.7
- 10.4.8
- 10.4.9
- 10.4.10
- 10.4.11
- 10.5
- 10.5.0
- 10.5.1
- 10.5.2
- 10.5.3
- 10.5.4
- 10.5.5
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:L/AC:L/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 3, 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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.62% (0.00620) | 47.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.62% (0.00620) | 44.82th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00112) | 27.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 11.52th | v3 (v2023.03.01) |
| Jun 12, 2024 | 0.04% (0.00043) | 9.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00043) | 7.57th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.76% (0.01761) | 76.53th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.76% (0.01761) | 76.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.76% (0.01761) | 74.44th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.76% (0.01761) | 53.69th | v2 (v2022.01.01) |
References (5)
- http://secunia.com/advisories/34424 third-party-advisoryx_refsource_SECUNIA
- http://www.digit-labs.org/files/exploits/xnu-vfssysctl-dos.c x_refsource_MISCExploit
- http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181 x_refsource_MISC
- http://www.securityfocus.com/bid/34202 vdb-entryx_refsource_BIDExploit
- https://www.exploit-db.com/exploits/8265 exploitx_refsource_EXPLOIT-DB
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/34424 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.digit-labs.org/files/exploits/xnu-vfssysctl-dos.c | x_refsource_MISCExploit | |
| http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181 | x_refsource_MISC | |
| http://www.securityfocus.com/bid/34202 | vdb-entryx_refsource_BIDExploit | |
| https://www.exploit-db.com/exploits/8265 | exploitx_refsource_EXPLOIT-DB |
Change history (0)
No recorded changes yet.