The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout, which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets
Published Jun 13, 2012
5.0
MEDIUMCVSS 2.0
EPSS 2.59%
Description
The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout, which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets.
Affected products
No data.
- ≤ 2.6.38.8
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38
- 2.6.38.1
- 2.6.38.2
- 2.6.38.3
- 2.6.38.4
- 2.6.38.5
- 2.6.38.6
- 2.6.38.7
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, 6, and Red Hat Enterprise MRG as they did not backport the upstream commit 4a94445c that introduced this issue.
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:L/Au:N/C:N/I:N/A:P
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.59% (0.02591) | 84.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.59% (0.02591) | 83.22th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.75% (0.00746) | 71.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.75% (0.00748) | 81.63th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.75% (0.00748) | 81.06th | v3 (v2023.03.01) |
| May 22, 2024 | 0.81% (0.00807) | 81.71th | v3 (v2023.03.01) |
| Nov 9, 2023 | 0.81% (0.00807) | 79.71th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.84% (0.00844) | 79.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
No CWE recorded.
References (7)
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 x_refsource_CONFIRM
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=64f3b9e203bd06855072e295557dca1485a2ecba x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2011/05/18/2 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2011-1927 Vendor Advisory
- https://github.com/torvalds/linux/commit/64f3b9e203bd06855072e295557dca1485a2ecba x_refsource_CONFIRMExploitPatch
- https://nvd.nist.gov/vuln/detail/CVE-2011-1927
- https://www.cve.org/CVERecord?id=CVE-2011-1927
| Link | Providers | Tags |
|---|---|---|
| http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 | x_refsource_CONFIRM | |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=64f3b9e203bd06855072e295557dca1485a2ecba | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2011/05/18/2 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2011-1927 | Vendor Advisory | |
| https://github.com/torvalds/linux/commit/64f3b9e203bd06855072e295557dca1485a2ecba | x_refsource_CONFIRMExploitPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-1927 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-1927 |
Change history (0)
No recorded changes yet.