What is CVE-2011-1020?

CVE-2011-1020 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.6 out of 10, classified as a Information Exposure flaw (CWE-200). CVE-2011-1020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-1020?

CVE-2011-1020 has a CVSS score of 4.6 out of 10, rated Medium severity. The vector string is AV:L/AC:L/Au:N/C:P/I:P/A:P.

Is there a patch available for CVE-2011-1020?

No patch is currently available for CVE-2011-1020. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-1020 actively exploited?

CVE-2011-1020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/200.html

CVE-2011-1020

Medium

The proc filesystem implementation in the Linux kernel 2.6.37 and earlier does not restrict access to the /proc directory tree of a process after this process performs an exec of a setuid program, which allows local users to obtain sensitive information or cause a denial of service via open, lseek, read, and write system calls.

Package Linux Kernel

Published 2011-02-28

Last modified 2026-04-29

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

4.6

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

Availability

Vector string

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

Weakness type

CWE-200

CVE-2011-1020 is a Information Exposure vulnerability

What is Information Exposure?

The product exposes sensitive information to an actor not authorised to see it. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2011-1020 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
http://openwall.com/lists/oss-security/2011/02/24/18

Mailing List Third Party Advisory
Openwall
http://openwall.com/lists/oss-security/2011/02/25/2

Mailing List Third Party Advisory
Seclists
http://seclists.org/fulldisclosure/2011/Jan/421

Exploit Mailing List Third Party Advisory
Secunia
http://secunia.com/advisories/43496

Third Party Advisory
Securityreason
http://securityreason.com/securityalert/8107

Third Party Advisory
Halfdog
http://www.halfdog.net/Security/2011/SuidBinariesAndProcInterface/

Exploit Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/46567

Third Party Advisory VDB Entry
Exchange
https://exchange.xforce.ibmcloud.com/vulnerabilities/65693

Third Party Advisory VDB Entry
Lkml
https://lkml.org/lkml/2011/2/10/21

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2011/2/7/368

Exploit Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2011/2/7/404

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2011/2/7/414

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2011/2/7/466

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2011/2/7/474

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2011/2/9/417

Mailing List Third Party Advisory

Details

CVE ID CVE-2011-1020

Severity Medium

CVSS score 4.6 / 10

CVSS version 2.0

Published 2011-02-28

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-1020?

CVE-2011-1020 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.6 out of 10 , classified as an Information Exposure flaw (CWE-200) . CVE-2011-1020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-1020?

CVE-2011-1020 has a CVSS score of 4.6 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:P/I:P/A:P.
Is there a patch available for CVE-2011-1020?

No patch is currently available for CVE-2011-1020. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-1020 actively exploited?

No — CVE-2011-1020 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. View CWE-200 on MITRE CWE →