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Vulnerability record · CVE-2012-0056 · published 27 January 2012

CVE-2012-0056: Linux kernel permissions and access controls vulnerability

Linux · Linux Kernel

The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when writing to /proc/<pid>/mem, which allows local users to gain privileges by modifying process memory, as demonstrated by Mempodipper.

6.9 CVSS 2.0 Medium EPSS 11% · top 4.3% CWE-264 · Permissions and access controls
6.9CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
28References
16 Jun 2026Last modified by NVD

Description

The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when writing to /proc/<pid>/mem, which allows local users to gain privileges by modifying process memory, as demonstrated by Mempodipper.

AV:L/AC:M/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://blog.zx2c4.com/749 Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=e268337dfe26dfc7efd422a804dbb27977a3 Vendor Advisory
http://secunia.com/advisories/47708 Broken Link
http://ubuntu.com/usn/usn-1336-1 Third Party Advisory
http://www.kb.cert.org/vuls/id/470151 Third Party AdvisoryUS Government Resource
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2 Vendor Advisory
http://www.openwall.com/lists/oss-security/2012/01/18/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2012/01/18/2 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2012/01/19/4 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2012/01/22/4 Mailing ListThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2012-0052.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2012-0061.html Third Party Advisory
http://www.securityfocus.com/bid/51625 Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=782642 Issue TrackingThird Party Advisory
http://blog.zx2c4.com/749 Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=e268337dfe26dfc7efd422a804dbb27977a3 Vendor Advisory
http://secunia.com/advisories/47708 Broken Link
http://ubuntu.com/usn/usn-1336-1 Third Party Advisory
http://www.kb.cert.org/vuls/id/470151 Third Party AdvisoryUS Government Resource
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2 Vendor Advisory
http://www.openwall.com/lists/oss-security/2012/01/18/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2012/01/18/2 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2012/01/19/4 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2012/01/22/4 Mailing ListThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2012-0052.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2012-0061.html Third Party Advisory
http://www.securityfocus.com/bid/51625 Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=782642 Issue TrackingThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2012-0056), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.