kernel: net: large udp packet over IPv6 over UFO-enabled device with TBF qdisc panic
Published Nov 19, 2013
7.1
HIGHCVSS 2.0
EPSS 3.90%
Description
The udp6_ufo_fragment function in net/ipv6/udp_offload.c in the Linux kernel through 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly perform a certain size comparison before inserting a fragment header, which allows remote attackers to cause a denial of service (panic) via a large IPv6 UDP packet, as demonstrated by use of the Token Bucket Filter (TBF) queueing discipline.
Affected products
No data.
Configuration 1
- ≥ 3.9.8 · ≤ 3.10.23
- ≥ 3.11 · < 3.12.4
Configuration 2
- 12.04
- 13.10
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | 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
Not vulnerable. This issue did not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/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 2, 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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 3.90% (0.03899) | 89.94th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.90% (0.03899) | 88.87th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.96% (0.01956) | 81.85th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.10% (0.06103) | 84.20th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.96% (0.01956) | 82.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.76% (0.01757) | 88.47th | v3 (v2023.03.01) |
| Jan 6, 2024 | 1.49% (0.01487) | 85.43th | v3 (v2023.03.01) |
| May 20, 2023 | 2.94% (0.02939) | 89.36th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.57% (0.01575) | 85.23th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (10)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0e033e04c2678dbbe74a46b23fffb7bb918c288e x_refsource_CONFIRMVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2013/11/13/9 mailing-listx_refsource_MLISTMailing ListPatch
- http://www.ubuntu.com/usn/USN-2113-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2117-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2013-4563 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1030015 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/0e033e04c2678dbbe74a46b23fffb7bb918c288e x_refsource_CONFIRMExploitPatch
- https://nvd.nist.gov/vuln/detail/CVE-2013-4563
- https://www.cve.org/CVERecord?id=CVE-2013-4563
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0e033e04c2678dbbe74a46b23fffb7bb918c288e | x_refsource_CONFIRMVendor Advisory | |
| http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html | vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2013/11/13/9 | mailing-listx_refsource_MLISTMailing ListPatch | |
| http://www.ubuntu.com/usn/USN-2113-1 | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| http://www.ubuntu.com/usn/USN-2117-1 | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2013-4563 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1030015 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/0e033e04c2678dbbe74a46b23fffb7bb918c288e | x_refsource_CONFIRMExploitPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2013-4563 | ||
| https://www.cve.org/CVERecord?id=CVE-2013-4563 |
Change history (0)
No recorded changes yet.