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TI-2011-02217 Aliases CVE-2011-2525GHSA-4hrf-7c2r-c5x7

The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does…

Priority LOW 35CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 3 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not prevent tc_fill_qdisc function calls referencing builtin (aka CQ_F_BUILTIN) Qdisc structures, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact via a crafted call.

Why it matters now

EPSS 0.00477 41st percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 3 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 2.6.35VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 2.6.35 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2011:1163 Released 2011-08-16 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5.6.z server) kernel-2.6.18-238.21.1.el5, kernel-2.6.18-238.21.1.el5.ia64, kernel-PAE-2.6.18-238.21.1.el5 +18
  • RHSA-2011:1065 Released 2011-07-21 · Red Hat rating Important
    Red Hat Enterprise Linux 5.7 kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-274.el5, kernel-2.6.18-274.el5.ia64, kernel-PAE-2.6.18-274.el5 +18
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-274.el5, kernel-PAE-2.6.18-274.el5, kernel-PAE-devel-2.6.18-274.el5 +8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 4AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2011:1065
Red Hat Enterprise Linux (v. 5.6.z server)Fixed RHSA-2011:1163
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2011:1065
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise MRG 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-2525
  2. 2026-10-03 Alias added: GHSA-4hrf-7c2r-c5x7

References

Patch 2

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences