CVE-2011-2525
The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not...
7.8 HighFix available
CVE-2011-2525 is a high vulnerability (CVSS 7.8) in Linux Kernel, published September 8, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. Fixed in linux-2.6 2.6.32-35squeeze1.
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
0.48%Down 0.6 points since Feb 4, 2022
What each source reports
NVD Score used
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.
- Record
CVE-2011-2525- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2011-2525- Updated
- 2026-11-02
EUVDEUVD-2011-2510 No score
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.
- Record
EUVD-2011-2510- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4hrf-7c2r-c5x7
The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not...
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.
- Record
GHSA-4hrf-7c2r-c5x7- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2011-2525
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.
- Record
UBUNTU-CVE-2011-2525- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linux-2.6Debian:6.0 |
before 2.6.32-35squeeze1, plus listed versions 2.6.32-302.6.32-30+m68k.52.6.32-312.6.32-31~bpo50+12.6.32-32 Show 5 moreShow less2.6.32-332.6.32-342.6.32-34squeeze12.6.32-352.6.32-35~bpo50+1 |
2.6.32-35squeeze1 |
linux-2.6Debian:5.0 |
before 2.6.26-26lenny4, plus listed versions 2.6.26-132.6.26-13lenny22.6.26-13lenny2~bpo40+12.6.26-142.6.26-15 Show 35 moreShow less2.6.26-15lenny12.6.26-15lenny22.6.26-15lenny32.6.26-15~bpo40+12.6.26-15~bpo40+22.6.26-162.6.26-172.6.26-17lenny12.6.26-17lenny22.6.26-17lenny2~bpo40+12.6.26-17~bpo40+12.6.26-182.6.26-192.6.26-19lenny12.6.26-19lenny22.6.26-19~bpo40+12.6.26-202.6.26-20~bpo40+12.6.26-212.6.26-21lenny12.6.26-21lenny22.6.26-21lenny32.6.26-21lenny42.6.26-21~bpo40+12.6.26-222.6.26-22lenny12.6.26-232.6.26-242.6.26-24lenny12.6.26-252.6.26-25lenny12.6.26-262.6.26-26lenny12.6.26-26lenny22.6.26-26lenny3 |
2.6.26-26lenny4 |
kernelRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-PAERed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-PAE-debuginfoRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-PAE-develRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debugRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debug-debuginfoRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debug-develRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debuginfoRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
Show 43 moreShow less
| Package | Affected | Fixed |
|---|---|---|
kernel-debuginfo-commonRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-develRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-docRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-headersRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-xenRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-xen-debuginfoRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-xen-develRed Hat:enterprise_linux:5::client |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernelRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-PAERed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-PAE-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-PAE-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debugRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debug-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debug-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-debuginfo-commonRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-docRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-headersRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-kdumpRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-kdump-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-kdump-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-xenRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-xen-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernel-xen-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-274.el5 | 0:2.6.18-274.el5 |
kernelRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-PAERed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-PAE-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-PAE-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-debugRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-debug-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-debug-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-debuginfo-commonRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-docRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-headersRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-kdumpRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-kdump-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-kdump-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-xenRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-xen-debuginfoRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
kernel-xen-develRed Hat:enterprise_linux:5::server |
before 0:2.6.18-238.21.1.el5 | 0:2.6.18-238.21.1.el5 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | affected | |
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
bugzilla.redhat.com/show_bug.cgi?id=720552
rhn.redhat.com/errata/RHSA-2011-1065.html
kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805
mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35
openwall.com/lists/oss-security/2011/07/12/1
Show 175 moreShow less
git.kernel.org?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3
nvd.nist.gov/vuln/detail/CVE-2011-2525
github.com/advisories/GHSA-4hrf-7c2r-c5x7
access.redhat.com/errata/RHSA-2011:1065
docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.7_Technical_Notes/kernel.html
security.access.redhat.com/data/csaf/v2/advisories/2011/rhsa-2011_1065.json
cve.org/CVERecord?id=CVE-2011-1780
ubuntu.com/security/CVE-2011-2525
debian.org/security/2011/dsa-2303