CVE-2010-4347

Severity: medium (CVSS 6.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-12-22 · updated 2026-06-16
Weakness: CWE-269

Description

The ACPI subsystem in the Linux kernel before 2.6.36.2 uses 0222 permissions for the debugfs custom_method file, which allows local users to gain privileges by placing a custom ACPI method in the ACPI interpreter tables, related to the acpi_debugfs_init function in drivers/acpi/debugfs.c.

Affected products

Linux kernel: before 2.6.36.2 — fixed in 2.6.36.2
Opensuse: 11.3
SUSE Linux Enterprise Real Time Extension: 11-sp1

How to fix

Upgrade to a fixed version: Linux kernel 2.6.36.2. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ed3aada1bf34c5a9e98af167f125f8a740fc726a
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
http://openwall.com/lists/oss-security/2010/12/15/3
http://openwall.com/lists/oss-security/2010/12/15/7
http://secunia.com/advisories/42778
http://www.exploit-db.com/exploits/15774/
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
http://www.securityfocus.com/bid/45408
http://www.vupen.com/english/advisories/2011/0012
http://www.vupen.com/english/advisories/2011/0298
https://bugzilla.redhat.com/show_bug.cgi?id=663542

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