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Fencer Intel
medium 5.5

CVE-2012-0810 json

The int3 handler in the Linux kernel before 3.3 relies on a per-CPU debug stack, which allows local users to cause a denial of service (sta…

published 2020-02-12 6 y ago modified 2026-06-16 4 mo ago also EUVD-2012-0837

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

The int3 handler in the Linux kernel before 3.3 relies on a per-CPU debug stack, which allows local users to cause a denial of service (stack corruption and panic) via a crafted application that triggers certain lock contention.

Patch / fix

  • linux linux_kernel 3.3
  • kernel-rt enterprise mrg 2 3.0.18-rt34.53.el6rt
  • kernel-rt-trace enterprise mrg 2 3.0.18-rt34.53.el6rt
  • kernel-rt-vanilla enterprise mrg 2 3.0.18-rt34.53.el6rt
  • kernel-rt-firmware enterprise mrg 2 3.0.18-rt34.53.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 3.0.18-rt34.53.el6rt

red hat advisories RHSA-2012:0333

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-2012-0810 updated cvss 6.1

kernel-rt: stack corruption when task gets scheduled out using the debug stack

  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.0.18-rt34.53.el6rt, kernel-rt-trace 3.0.18-rt34.53.el6rt, kernel-rt-vanilla 3.0.18-rt34.53.el6rt, kernel-rt-firmware 3.0.18-rt34.53.el6rt, kernel-rt-debuginfo-common-x86_64 3.0.18-rt34.53.el6rt
    fixed: vendor fix RHSA-2012:0333
  • Red Hat Enterprise Linux 4 kernel Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    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

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • Linux Foundation Linux kernel

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
Technology feeds

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.