kernel: netfilter: Out-of-bounds write due to a signedness issue when defragmenting IPv6 packets
Published Dec 28, 2016
7.8
HIGHCVSS 3.0
EPSS 0.39%
Description
The netfilter subsystem in the Linux kernel before 4.9 mishandles IPv6 reassembly, which allows local users to cause a denial of service (integer overflow, out-of-bounds write, and GPF) or possibly have unspecified other impact via a crafted application that makes socket, connect, and writev system calls, related to net/ipv6/netfilter/nf_conntrack_reasm.c and net/ipv6/netfilter/nf_defrag_ipv6_hooks.c.
Affected products
No data.
- ≤ 4.8.15
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 Linux 7
kernel-rt
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 Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
AV:L/AC:L/Au:N/C:P/I:P/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00390) | 30.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00390) | 30.57th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00051) | 12.91th | 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) |
| 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/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa x_refsource_CONFIRMPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/12/01/10 mailing-listx_refsource_MLISTMailing List
- http://www.securityfocus.com/bid/94626 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2016-9755 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1400904 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa x_refsource_CONFIRM
- https://groups.google.com/forum/#%21topic/syzkaller/GFbGpX7nTEo x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2016-9755
- https://www.cve.org/CVERecord?id=CVE-2016-9755
- https://www.spinics.net/lists/netdev/msg407525.html mailing-listx_refsource_MLISTMailing ListPatch
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa | x_refsource_CONFIRMPatchVendor Advisory | |
| http://www.openwall.com/lists/oss-security/2016/12/01/10 | mailing-listx_refsource_MLISTMailing List | |
| http://www.securityfocus.com/bid/94626 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2016-9755 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1400904 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa | x_refsource_CONFIRM | |
| https://groups.google.com/forum/#%21topic/syzkaller/GFbGpX7nTEo | x_refsource_CONFIRM | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9755 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-9755 | ||
| https://www.spinics.net/lists/netdev/msg407525.html | mailing-listx_refsource_MLISTMailing ListPatch |
Change history (0)
No recorded changes yet.