kernel: kernel: net_sched: fix qdisc_notify()
Published Feb 2, 2012
7.8
HIGHCVSS 3.1
EPSS 0.48%
Description
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.
Affected products
No data.
Configuration 1
- < 2.6.35
Configuration 2
- 4.0
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-238.21.1.el5
Fixed · RHSA-2011:1163
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.el5
Fixed · RHSA-2011:1065
Red Hat Enterprise Linux 4
kernel
Will not fix
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-238.21.1.el5 | Fixed | RHSA-2011:1163 |
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.el5 | Fixed | RHSA-2011:1065 |
| Red Hat Enterprise Linux 4 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw affects Red Hat Enterprise Linux 4 and 5. It did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as they have already backported the upstream commit 53b0f080 that addressed this flaw. This has been addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2011-1065.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.48% (0.00477) | 38.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.49% (0.00491) | 38.13th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00103) | 25.92th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.03% (0.01034) | 41.16th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.28% (0.01282) | 67.60th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (10)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3 x_refsource_CONFIRM
- http://kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805 mailing-listx_refsource_MLISTBroken Link
- http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35 x_refsource_CONFIRMBroken Link
- http://openwall.com/lists/oss-security/2011/07/12/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2011-1065.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2011-1163.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2011-2525 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=720552 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-2525
- https://www.cve.org/CVERecord?id=CVE-2011-2525
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=53b0f08042f04813cd1a7473dacd3edfacb28eb3 | x_refsource_CONFIRM | |
| http://kerneltrap.org/mailarchive/linux-netdev/2010/5/21/6277805 | mailing-listx_refsource_MLISTBroken Link | |
| http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.35 | x_refsource_CONFIRMBroken Link | |
| http://openwall.com/lists/oss-security/2011/07/12/1 | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| http://rhn.redhat.com/errata/RHSA-2011-1065.html | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| http://rhn.redhat.com/errata/RHSA-2011-1163.html | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2011-2525 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=720552 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2525 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2525 |
Change history (0)
No recorded changes yet.