The exit_thread function (process.c) in Linux kernel 2.6 through 2.6.5 does not…
Priority LOW 37Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
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.
Why it matters now
EPSS 0.02338 83rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:* | 2.6.0 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:* | 2.6.1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.1:rc1:*:*:*:*:*:* | 2.6.1 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.1:rc2:*:*:*:*:*:* | 2.6.1 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:* | 2.6.2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.3:*:*:*:*:*:*:* | 2.6.3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.4:*:*:*:*:*:*:* | 2.6.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.5:*:*:*:*:*:*:* | 2.6.5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:* Versions 2.6.0 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:* Versions 2.6.1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.1:rc1:*:*:*:*:*:* Versions 2.6.1 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.1:rc2:*:*:*:*:*:* Versions 2.6.1 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:* Versions 2.6.2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.3:*:*:*:*:*:*:* Versions 2.6.3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.4:*:*:*:*:*:*:* Versions 2.6.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.5:*:*:*:*:*:*:* Versions 2.6.5 Vulnerable ·Linux
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2004-2536
- 2026-10-03 Alias added: GHSA-93h5-jmg6-mmph
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2004-2536 · CVE Program
- CVE-2004-2536 · NVD
- FIRST EPSS
- GHSA-93h5-jmg6-mmph · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences