kernel: Out of bounds read in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() in SCTP stack
Published Jul 26, 2018
7.5
HIGHCVSS 3.0
EPSS 3.62%
Description
A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.
Affected products
-
- Version 4.7-rc1 through 4.13StatusaffectedConstraints-
- Version
Configuration 1
- ≥ 4.7 · ≤ 4.13
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
- 4.7
Configuration 2
- 8.0
- 9.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-693.5.2.el7
Fixed · RHSA-2017:2930
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-693.5.2.rt56.626.el7
Fixed · RHSA-2017:2931
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.5.2.rt56.592.el6rt
Fixed · RHSA-2017:2918
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-693.5.2.el7 | Fixed | RHSA-2017:2930 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-693.5.2.rt56.626.el7 | Fixed | RHSA-2017:2931 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.5.2.rt56.592.el6rt | Fixed | RHSA-2017:2918 |
| 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-alt | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect Red Hat Enterprise Linux 5 and 6 as the code with the flaw is not present in the products listed. This issue affects Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future updates for the respective releases may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.62% (0.03615) | 89.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.76% (0.03763) | 88.46th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.81% (0.00814) | 72.06th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.11% (0.04105) | 80.67th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.81% (0.00814) | 72.60th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.39% (0.00390) | 74.13th | v3 (v2023.03.01) |
| Feb 19, 2024 | 0.78% (0.00783) | 80.87th | v3 (v2023.03.01) |
| Jan 26, 2024 | 1.00% (0.00997) | 81.99th | v3 (v2023.03.01) |
| Dec 17, 2023 | 1.65% (0.01650) | 86.19th | v3 (v2023.03.01) |
| Jul 20, 2023 | 2.69% (0.02688) | 89.02th | v3 (v2023.03.01) |
| May 8, 2023 | 2.63% (0.02630) | 88.73th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.44% (0.02441) | 88.28th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.07% (0.02069) | 50.36th | v1 |
| Jan 6, 2022 | 2.07% (0.02069) | 49.86th | v1 |
| Sep 1, 2021 | 2.07% (0.02069) | 77.27th | v1 |
| Apr 14, 2021 | 2.07% (0.02069) | 0.00th | v1 |
References (13)
- http://seclists.org/oss-sec/2017/q3/338 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/100466 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039221 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2918 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2930 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2931 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-7558 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1480266 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7558 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://marc.info/?l=linux-netdev&m=150348777122761&w=2 mailing-listx_refsource_MLISTPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-7558
- https://www.cve.org/CVERecord?id=CVE-2017-7558
- https://www.debian.org/security/2017/dsa-3981 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.