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CVE-2004-2536
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…
High7.5EPSS 2.3%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.3% · top 16% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (7)
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6 (opens in a new tab)x_refsource_CONFIRMx_transferred
- linux-exitthread-gain-privileges(16106) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 5997 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 10302 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20040507 Bug in IO bitmap handling? Probably exploitable (2.6.5) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 11577 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20040507 Re: Bug in IO bitmap handling? Probably exploitable (2.6.5) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2004-2536)Record last updated .