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Fencer Intel
low 3.7

CVE-2011-2503 json

The insert_module function in runtime/staprun/staprun_funcs.c in the systemtap runtime tool (staprun) in SystemTap before 1.6 does not prop…

published 2012-07-26 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2490

cvss
3.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

The insert_module function in runtime/staprun/staprun_funcs.c in the systemtap runtime tool (staprun) in SystemTap before 1.6 does not properly validate a module when loading it, which allows local users to gain privileges via a race condition between the signature validation and the module initialization.

Patch / fix

  • systemtap Debian 14, Debian 13, Debian 12 1.6-1

debian advisories DEBIAN-CVE-2011-2503

  • systemtap RHEL 5 1.3-9.el5
  • systemtap-client RHEL 5 1.3-9.el5
  • systemtap-server RHEL 5 1.3-9.el5
  • systemtap-runtime RHEL 5 1.3-9.el5
  • systemtap-testsuite RHEL 5 1.3-9.el5
  • systemtap-initscript RHEL 5 1.3-9.el5
  • systemtap RHEL 6 1.4-6.el6_1.2
  • systemtap-client RHEL 6 1.4-6.el6_1.2

red hat advisories RHSA-2011:1089RHSA-2011:1088

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2503 updated cvss 6.0

systemtap: signed module loading race condition

  • Red Hat Enterprise Linux 4 systemtap
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) systemtap 1.3-9.el5, systemtap-client 1.3-9.el5, systemtap-server 1.3-9.el5, systemtap-runtime 1.3-9.el5, systemtap-testsuite 1.3-9.el5, systemtap-initscript 1.3-9.el5 Red Hat Enterprise Linux Desktop (v. 5 client) systemtap 1.3-9.el5, systemtap-client 1.3-9.el5, systemtap-server 1.3-9.el5, systemtap-runtime 1.3-9.el5, systemtap-testsuite 1.3-9.el5, systemtap-initscript 1.3-9.el5
    fixed: vendor fix RHSA-2011:1089
  • Red Hat Enterprise Linux Server (v. 6) systemtap 1.4-6.el6_1.2, systemtap-client 1.4-6.el6_1.2, systemtap-server 1.4-6.el6_1.2, systemtap-grapher 1.4-6.el6_1.2, systemtap-runtime 1.4-6.el6_1.2, systemtap-initscript 1.4-6.el6_1.2 Red Hat Enterprise Linux Server Optional (v. 6) systemtap 1.4-6.el6_1.2, systemtap-testsuite 1.4-6.el6_1.2
    fixed: vendor fix RHSA-2011:1088

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.7 AV:L/AC:H/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.