kernel: ipv6: make fragment identifications less predictable
Published May 24, 2012
7.5
HIGHCVSS 3.1
EPSS 5.62%
Description
The IPv6 implementation in the Linux kernel before 3.1 does not generate Fragment Identification values separately for each destination, which makes it easier for remote attackers to cause a denial of service (disrupted networking) by predicting these values and sending crafted packets.
Affected products
No data.
Configuration 1
- < 3.1
Configuration 2
- 4.0
- 2.0
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.7.1.el5
Fixed · RHSA-2011:1386
Red Hat Enterprise Linux 5.6 EUS - Server Only
kernel-0:2.6.18-238.35.1.el5
Fixed · RHSA-2012:0358
Red Hat Enterprise Linux 6
kernel-0:2.6.32-131.21.1.el6
Fixed · RHSA-2011:1465
Red Hat Enterprise Linux 4
kernel
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.7.1.el5 | Fixed | RHSA-2011:1386 |
| Red Hat Enterprise Linux 5.6 EUS - Server Only | kernel-0:2.6.18-238.35.1.el5 | Fixed | RHSA-2012:0358 |
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-131.21.1.el6 | Fixed | RHSA-2011:1465 |
| Red Hat Enterprise Linux 4 | kernel | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the Linux kernel as shipped with Red Hat Enterprise MRG as it has backported the fix that addresses this issue. 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. This has been addressed in Red Hat Enterprise Linux 5 and 6 via https://rhn.redhat.com/errata/RHSA-2011-1386.html and https://rhn.redhat.com/errata/RHSA-2011-1465.html.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/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 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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.62% (0.05616) | 92.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.57% (0.05573) | 91.85th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.75% (0.00752) | 70.86th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.10% (0.02095) | 73.39th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.75% (0.00752) | 71.45th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.21% (0.01215) | 85.91th | v3 (v2023.03.01) |
| Apr 18, 2024 | 1.21% (0.01215) | 85.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.21% (0.01215) | 83.10th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.32% (0.01319) | 70.74th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.17% (0.02172) | 80.18th | 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) |
No CWE recorded.
References (10)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=87c48fa3b4630905f98268dde838ee43626a060c x_refsource_CONFIRM
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1 x_refsource_CONFIRMMailing ListPatchVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 vendor-advisoryx_refsource_MANDRIVABroken Link
- http://www.openwall.com/lists/oss-security/2011/07/20/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securitytracker.com/id?1027274 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2011-2699 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=723429 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/87c48fa3b4630905f98268dde838ee43626a060c x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-2699
- https://www.cve.org/CVERecord?id=CVE-2011-2699
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=87c48fa3b4630905f98268dde838ee43626a060c | x_refsource_CONFIRM | |
| http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1 | x_refsource_CONFIRMMailing ListPatchVendor Advisory | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 | vendor-advisoryx_refsource_MANDRIVABroken Link | |
| http://www.openwall.com/lists/oss-security/2011/07/20/5 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securitytracker.com/id?1027274 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2011-2699 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=723429 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://github.com/torvalds/linux/commit/87c48fa3b4630905f98268dde838ee43626a060c | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2699 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2699 |
Change history (0)
No recorded changes yet.