The exit_thread function (process.c) in Linux kernel 2.6 through 2.6.5 does not invalidate the per-TSS io_bitmap pointers if a process obtains IO access permissions from the ioperm function but does not drop those permissions when it exits, which allows other processes to access the per-TSS pointers, access restricted memory locations, and possibly gain privileges
Published Oct 25, 2005
7.5
HIGHCVSS 2.0
EPSS 2.34%
Description
The exit_thread function (process.c) in Linux kernel 2.6 through 2.6.5 does not invalidate the per-TSS io_bitmap pointers if a process obtains IO access permissions from the ioperm function but does not drop those permissions when it exits, which allows other processes to access the per-TSS pointers, access restricted memory locations, and possibly gain privileges.
Affected products
No data.
- 2.6.0
- 2.6.1
- 2.6.1
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
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:N/AC:L/Au:N/C:P/I:P/A:P
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.34% (0.02338) | 82.98th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.34% (0.02338) | 81.32th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.48% (0.00482) | 63.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.60% (0.00601) | 79.19th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.71% (0.00709) | 79.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.71% (0.00712) | 77.41th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
No CWE recorded.
References (7)
- http://secunia.com/advisories/11577 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6 x_refsource_CONFIRM
- http://www.osvdb.org/5997 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/10302 vdb-entryx_refsource_BID
- http://www.ussg.iu.edu/hypermail/linux/kernel/0405.0/1242.html mailing-listx_refsource_MLISTExploitPatch
- http://www.ussg.iu.edu/hypermail/linux/kernel/0405.0/1265.html mailing-listx_refsource_MLIST
- https://exchange.xforce.ibmcloud.com/vulnerabilities/16106 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/11577 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6 | x_refsource_CONFIRM | |
| http://www.osvdb.org/5997 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/10302 | vdb-entryx_refsource_BID | |
| http://www.ussg.iu.edu/hypermail/linux/kernel/0405.0/1242.html | mailing-listx_refsource_MLISTExploitPatch | |
| http://www.ussg.iu.edu/hypermail/linux/kernel/0405.0/1265.html | mailing-listx_refsource_MLIST | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/16106 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.