CVE-2011-1021

Severity: low (CVSS 3.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-06-21 · updated 2026-06-16
Weakness: CWE-264

Description

drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.

Affected products

Linux kernel: through 2.6.9; 2.6.9-rc1, 2.6.9-rc2, 2.6.9-rc3, 2.6.9-rc4

References

http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=526b4af47f44148c9d665e57723ed9f86634c6e3
http://www.openwall.com/lists/oss-security/2011/02/25/5
https://bugzilla.redhat.com/show_bug.cgi?id=680841
https://github.com/torvalds/linux/commit/526b4af47f44148c9d665e57723ed9f86634c6e3
http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=526b4af47f44148c9d665e57723ed9f86634c6e3
http://www.openwall.com/lists/oss-security/2011/02/25/5
https://bugzilla.redhat.com/show_bug.cgi?id=680841
https://github.com/torvalds/linux/commit/526b4af47f44148c9d665e57723ed9f86634c6e3

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