kernel: TIPC subsystem: tipc_msg_build() doesn't validate MTU, may cause memory corruption.
Published Nov 28, 2016
7.8
HIGHCVSS 3.1
EPSS 0.40%
Description
The tipc_msg_build function in net/tipc/msg.c in the Linux kernel through 4.8.11 does not validate the relationship between the minimum fragment length and the maximum packet size, which allows local users to gain privileges or cause a denial of service (heap-based buffer overflow) by leveraging the CAP_NET_ADMIN capability.
Affected products
No data.
- ≥ 2.6.16 · < 3.2.85
- ≥ 3.3 · < 3.16.40
- ≥ 3.17 · < 4.1.37
- ≥ 4.2 · < 4.4.65
- ≥ 4.5 · < 4.8.14
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
Red Hat statement
This issue is rated as important. The affected code is not enabled on Red Hat Enterprise Linux 6 and 7 or MRG-2 kernels. The commit introducing the comment was not included in Red Hat Enterprise Linux 5.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.40% (0.00399) | 31.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.40% (0.00399) | 31.50th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00101) | 25.60th | 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 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
References (7)
- http://www.openwall.com/lists/oss-security/2016/11/08/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/94211 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-8632 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1390832 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-8632
- https://www.cve.org/CVERecord?id=CVE-2016-8632
- https://www.mail-archive.com/netdev%40vger.kernel.org/msg133205.html mailing-listx_refsource_MLIST
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2016/11/08/5 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/94211 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2016-8632 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1390832 | x_refsource_CONFIRMIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-8632 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-8632 | ||
| https://www.mail-archive.com/netdev%40vger.kernel.org/msg133205.html | mailing-listx_refsource_MLIST |
Change history (0)
No recorded changes yet.