Is CVE-2011-1020 being actively exploited?

CVE-2011-1020 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2011-1020 has a CVSS 2.0 base score of 4.6 (MEDIUM).

CVE-2011-1020

MEDIUM · CVSS 4.6EPSS 0.9%EU EUVD

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.

Key facts

CVSS score: 4.6 (v2.0)
Severity: MEDIUM
CVSS vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-200
EPSS score: 0.9% (61th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1037)
Published: February 28, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1037 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

linux / linux kernel

References

http://openwall.com/lists/oss-security/2011/02/24/18(Mailing List, Third Party Advisory)
http://openwall.com/lists/oss-security/2011/02/25/2(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2011/Jan/421(Exploit, Mailing List, Third Party Advisory)
http://secunia.com/advisories/43496(Third Party Advisory)
http://securityreason.com/securityalert/8107(Third Party Advisory)
http://www.halfdog.net/Security/2011/SuidBinariesAndProcInterface/(Exploit, Third Party Advisory)
http://www.securityfocus.com/bid/46567(Third Party Advisory, VDB Entry)
https://exchange.xforce.ibmcloud.com/vulnerabilities/65693(Third Party Advisory, VDB Entry)
https://lkml.org/lkml/2011/2/10/21(Mailing List, Third Party Advisory)
https://lkml.org/lkml/2011/2/7/368(Exploit, Mailing List, Third Party Advisory)
https://lkml.org/lkml/2011/2/7/404(Mailing List, Third Party Advisory)
https://lkml.org/lkml/2011/2/7/414(Mailing List, Third Party Advisory)
https://lkml.org/lkml/2011/2/7/466(Mailing List, Third Party Advisory)
https://lkml.org/lkml/2011/2/7/474(Mailing List, Third Party Advisory)
https://lkml.org/lkml/2011/2/9/417(Mailing List, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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