kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm()
Published Aug 9, 2012
7.8
HIGHCVSS 2.0
EPSS 4.47%
Description
net/ipv6/netfilter/nf_conntrack_reasm.c in the Linux kernel before 2.6.34, when the nf_conntrack_ipv6 module is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via certain types of fragmented IPv6 packets.
Affected products
No data.
- ≤ 2.6.33.20
- 2.6.33
- 2.6.33.1
- 2.6.33.2
- 2.6.33.3
- 2.6.33.4
- 2.6.33.5
- 2.6.33.6
- 2.6.33.7
- 2.6.33.8
- 2.6.33.9
- 2.6.33.10
- 2.6.33.11
- 2.6.33.12
- 2.6.33.13
- 2.6.33.14
- 2.6.33.15
- 2.6.33.16
- 2.6.33.17
- 2.6.33.18
- 2.6.33.19
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-279.1.1.el6
Fixed · RHSA-2012:1064
Red Hat Enterprise Linux 6.0 EUS - Server Only
kernel-0:2.6.32-71.40.1.el6
Fixed · RHSA-2012:1114
Red Hat Enterprise Linux 6.1 EUS - Server Only
kernel-0:2.6.32-131.30.1.el6
Fixed · RHSA-2012:1148
Red Hat Enterprise Linux 6.2 EUS - Server and Compute Node Only
kernel-0:2.6.32-220.24.1.el6
Fixed · RHSA-2012:1129
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-279.1.1.el6 | Fixed | RHSA-2012:1064 |
| Red Hat Enterprise Linux 6.0 EUS - Server Only | kernel-0:2.6.32-71.40.1.el6 | Fixed | RHSA-2012:1114 |
| Red Hat Enterprise Linux 6.1 EUS - Server Only | kernel-0:2.6.32-131.30.1.el6 | Fixed | RHSA-2012:1148 |
| Red Hat Enterprise Linux 6.2 EUS - Server and Compute Node Only | kernel-0:2.6.32-220.24.1.el6 | Fixed | RHSA-2012:1129 |
| Red Hat Enterprise Linux 5 | 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 issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 as they did not include support for netfilter's ipv6 connection tracking module. This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux MRG as they already contain the upstream commit that fixes 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: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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.47% (0.04469) | 91.14th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.43% (0.04433) | 90.10th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.62% (0.00623) | 68.36th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.35% (0.04348) | 92.66th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.35% (0.04348) | 91.04th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.97% (0.01974) | 78.46th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
References (12)
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34 x_refsource_CONFIRM
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9e2dcf72023d1447f09c47d77c99b0c49659e5ce x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2012-1064.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2012-1148.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/49928 third-party-advisoryx_refsource_SECUNIA
- http://www.securityfocus.com/bid/54367 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1027235 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2012-2744 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=833402 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/9e2dcf72023d1447f09c47d77c99b0c49659e5ce x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2012-2744
- https://www.cve.org/CVERecord?id=CVE-2012-2744
| Link | Providers | Tags |
|---|---|---|
| http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34 | x_refsource_CONFIRM | |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9e2dcf72023d1447f09c47d77c99b0c49659e5ce | x_refsource_CONFIRM | |
| http://rhn.redhat.com/errata/RHSA-2012-1064.html | vendor-advisoryx_refsource_REDHAT | |
| http://rhn.redhat.com/errata/RHSA-2012-1148.html | vendor-advisoryx_refsource_REDHAT | |
| http://secunia.com/advisories/49928 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.securityfocus.com/bid/54367 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1027235 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2012-2744 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=833402 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/9e2dcf72023d1447f09c47d77c99b0c49659e5ce | x_refsource_CONFIRMPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-2744 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-2744 |
Change history (0)
No recorded changes yet.