CVE-2004-2536 json
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 obta…
published 2004-12-31 21 y ago modified 2026-06-16 4 mo ago also EUVD-2004-2527
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
2.34% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- ussg.iu.edu http://www.ussg.iu.edu/hypermail/linux/kernel/0405.0/1242.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Technology feeds
References
-
ussg.iu.edu
/hypermail/linux/kernel/0405.0/1242.html
mailing-list, exploit, patch
-
secunia.com
/advisories/11577
third-party-advisory, vendor-advisory
- kernel.org /pub/linux/kernel/v2.6/ChangeLog-2.6.6
-
exchange.xforce.ibmcloud.com
/vulnerabilities/16106
vdb-entry
-
osvdb.org
/5997
vdb-entry
-
securityfocus.com
/bid/10302
vdb-entry
-
ussg.iu.edu
/hypermail/linux/kernel/0405.0/1265.html
mailing-list
Sources
- CVE List CVE-2004-2536
- NVD CVE-2004-2536
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