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low 2.1

CVE-2010-4158 json

The sk_run_filter function in net/core/filter.c in the Linux kernel before 2.6.36.2 does not check whether a certain memory location has be…

published 2010-12-30 15 y ago modified 2026-06-16 4 mo ago also EUVD-2010-4134

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
1
Exploit-DB

Summary

The sk_run_filter function in net/core/filter.c in the Linux kernel before 2.6.36.2 does not check whether a certain memory location has been initialized before executing a (1) BPF_S_LD_MEM or (2) BPF_S_LDX_MEM instruction, which allows local users to obtain potentially sensitive information from kernel stack memory via a crafted socket filter.

Patch / fix

  • linux linux_kernel 2.6.36.2
  • kernel RHEL 6 2.6.32-71.14.1.el6
  • perf RHEL 6 2.6.32-71.14.1.el6
  • kernel-kdump RHEL 6 2.6.32-71.14.1.el6
  • kernel-firmware RHEL 6 2.6.32-71.14.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-71.14.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-71.14.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-71.14.1.el6
  • kernel-debuginfo-common-s390x RHEL 6 2.6.32-71.14.1.el6

red hat advisories RHSA-2011:0007RHSA-2011:0162RHSA-2011:0017RHSA-2010:0958

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-2010-4158 updated cvss 4.9

kernel: socket filters infoleak

  • Red Hat MRG Realtime for RHEL 5 Server perf 2.6.33.7-rt29.47.el5rt, kernel-rt 2.6.33.7-rt29.47.el5rt, kernel-rt-trace 2.6.33.7-rt29.47.el5rt, kernel-rt-vanilla 2.6.33.7-rt29.47.el5rt, kernel-rt-debuginfo-common 2.6.33.7-rt29.47.el5rt
    fixed: vendor fix RHSA-2010:0958
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-238.el5, kernel-PAE 2.6.18-238.el5, kernel-xen 2.6.18-238.el5, kernel-kdump 2.6.18-238.el5, kernel-debuginfo-common 2.6.18-238.el5
    fixed: vendor fix RHSA-2011:0017
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-89.35.1.EL, kernel-smp 2.6.9-89.35.1.EL, kernel-xenU 2.6.9-89.35.1.EL, kernel-hugemem 2.6.9-89.35.1.EL, kernel-largesmp 2.6.9-89.35.1.EL
    fixed: vendor fix RHSA-2011:0162
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-238.el5, kernel-PAE 2.6.18-238.el5, kernel-xen 2.6.18-238.el5, kernel-kdump 2.6.18-238.el5, kernel-debuginfo-common 2.6.18-238.el5
    fixed: vendor fix RHSA-2011:0017
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-71.14.1.el6, kernel 2.6.32-71.14.1.el6, kernel-kdump 2.6.32-71.14.1.el6, kernel-firmware 2.6.32-71.14.1.el6, kernel-bootwrapper 2.6.32-71.14.1.el6, kernel-debuginfo-common-i686 2.6.32-71.14.1.el6, +3 more
    fixed: vendor fix RHSA-2011:0007
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.35.1.EL, kernel-smp 2.6.9-89.35.1.EL, kernel-xenU 2.6.9-89.35.1.EL, kernel-hugemem 2.6.9-89.35.1.EL, kernel-largesmp 2.6.9-89.35.1.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.35.1.EL, kernel-smp 2.6.9-89.35.1.EL, kernel-xenU 2.6.9-89.35.1.EL, kernel-hugemem 2.6.9-89.35.1.EL, kernel-largesmp 2.6.9-89.35.1.EL
    fixed: vendor fix RHSA-2011:0162
  • Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-71.14.1.el6, kernel 2.6.32-71.14.1.el6, kernel-kdump 2.6.32-71.14.1.el6, kernel-firmware 2.6.32-71.14.1.el6, kernel-bootwrapper 2.6.32-71.14.1.el6, kernel-debuginfo-common-i686 2.6.32-71.14.1.el6, +3 more Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-71.14.1.el6, kernel 2.6.32-71.14.1.el6, kernel-kdump 2.6.32-71.14.1.el6, kernel-firmware 2.6.32-71.14.1.el6, kernel-bootwrapper 2.6.32-71.14.1.el6, kernel-debuginfo-common-i686 2.6.32-71.14.1.el6, +3 more Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-71.14.1.el6, kernel 2.6.32-71.14.1.el6, kernel-kdump 2.6.32-71.14.1.el6, kernel-firmware 2.6.32-71.14.1.el6, kernel-bootwrapper 2.6.32-71.14.1.el6, kernel-debuginfo-common-i686 2.6.32-71.14.1.el6, +3 more
    fixed: vendor fix RHSA-2011:0007
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.35.1.EL, kernel-smp 2.6.9-89.35.1.EL, kernel-xenU 2.6.9-89.35.1.EL, kernel-hugemem 2.6.9-89.35.1.EL, kernel-largesmp 2.6.9-89.35.1.EL
    fixed: vendor fix RHSA-2011:0162

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

Timeline

  1. First public exploit (EDB-34987)
  2. Published

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-34987 Linux Kernel 2.6.x - 'net/core/filter.c' Local Information Disclosure local, 2010-11-09
  • securityfocus.com http://www.securityfocus.com/archive/1/514845 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/archive/1/514705 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
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.