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Fencer Intel
low 1.2

CVE-2011-1781 json

SystemTap 1.4, when unprivileged (aka stapusr) mode is enabled, allows local users to cause a denial of service (divide-by-zero error and O…

published 2011-08-29 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1779

cvss
1.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

SystemTap 1.4, when unprivileged (aka stapusr) mode is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) via a crafted ELF program with DWARF expressions that are not properly handled by a stap script that performs stack unwinding (aka backtracing).

Patch / fix

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

debian advisories DEBIAN-CVE-2011-1781

  • systemtap RHEL 6 1.4-6.el6_1.1
  • systemtap-client RHEL 6 1.4-6.el6_1.1
  • systemtap-server RHEL 6 1.4-6.el6_1.1
  • systemtap-grapher RHEL 6 1.4-6.el6_1.1
  • systemtap-runtime RHEL 6 1.4-6.el6_1.1
  • systemtap-testsuite RHEL 6 1.4-6.el6_1.1
  • systemtap-initscript RHEL 6 1.4-6.el6_1.1

red hat advisories RHSA-2011:0842

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-2011-1781 updated cvss 4.6

systemtap: divide by zero stack unwinding flaw

  • Red Hat Enterprise Linux Server (v. 6) systemtap 1.4-6.el6_1.1, systemtap-client 1.4-6.el6_1.1, systemtap-server 1.4-6.el6_1.1, systemtap-grapher 1.4-6.el6_1.1, systemtap-runtime 1.4-6.el6_1.1, systemtap-initscript 1.4-6.el6_1.1 Red Hat Enterprise Linux Server Optional (v. 6) systemtap 1.4-6.el6_1.1, systemtap-testsuite 1.4-6.el6_1.1
    fixed: vendor fix RHSA-2011:0842
  • Red Hat Enterprise Linux 4 systemtap Red Hat Enterprise Linux 5 systemtap
    not affected: vulnerable code not present

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

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 1.2 AV:L/AC:H/Au:N/C:N/I:N/A:P

Classification

Weakness

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.