CVE-2004-2536 Privilege escalation in n/a

What is CVE-2004-2536?

CVE-2004-2536 is a high-severity vulnerability in Linux kernel, published on 25 Oct 2005. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2004-2536?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2004-2536?

No fix has been published for CVE-2004-2536 yet. Limit exposure of the affected software until one is available.

Is CVE-2004-2536 being exploited?

There is no known exploitation of CVE-2004-2536 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-93h5-jmg6-mmph.