{"cve":"CVE-2011-1020","nvd":{"published":"2011-02-28T16:00:01.930","modified":"2026-06-16T23:28:34.133","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["http://openwall.com/lists/oss-security/2011/02/24/18","http://openwall.com/lists/oss-security/2011/02/25/2","http://seclists.org/fulldisclosure/2011/Jan/421","http://secunia.com/advisories/43496","http://securityreason.com/securityalert/8107"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T19:57:56.749847046+00:00"},"epss":{"cve":"CVE-2011-1020","score":0.00923,"percentile":0.60406,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}