CVE-2004-2536

high

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.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/16106

http://www.ussg.iu.edu/hypermail/linux/kernel/0405.0/1265.html

http://www.securityfocus.com/bid/10302

http://www.osvdb.org/5997

http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6

http://secunia.com/advisories/11577

Details

Source: Mitre, NVD

Published: 2004-12-31

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00482