kernel: Use-after-free in snd_seq_ioctl_create_port()
Published Oct 16, 2017
7.0
HIGHCVSS 3.1
EPSS 0.38%
Description
Race condition in the ALSA subsystem in the Linux kernel before 4.13.8 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted /dev/snd/seq ioctl calls, related to sound/core/seq/seq_clientmgr.c and sound/core/seq/seq_ports.c.
Affected products
No data.
- < 3.2.95
- ≥ 3.3 · < 3.10.108
- ≥ 3.11 · < 3.16.50
- ≥ 3.17 · < 3.18.76
- ≥ 3.19 · < 4.1.46
- ≥ 4.2 · < 4.4.93
- ≥ 4.5 · < 4.9.57
- ≥ 4.10 · < 4.13.8
No data.
Red Hat Enterprise Linux 5 Extended Lifecycle Support
kernel-0:2.6.18-436.el5
Fixed · RHSA-2018:3822
Red Hat Enterprise Linux 5.9 Long Life
kernel-0:2.6.18-348.42.1.el5
Fixed · RHSA-2018:3823
Red Hat Enterprise Linux 6
kernel-0:2.6.32-754.3.5.el6
Fixed · RHSA-2018:2390
Red Hat Enterprise Linux 7
kernel-0:3.10.0-862.el7
Fixed · RHSA-2018:1062
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-862.rt56.804.el7
Fixed · RHSA-2018:0676
Red Hat Enterprise Linux 7.4 Extended Update Support
kernel-0:3.10.0-693.25.2.el7
Fixed · RHSA-2018:1130
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.25.2.rt56.612.el6rt
Fixed · RHSA-2018:1170
Red Hat Enterprise Linux 7
kernel-alt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 Extended Lifecycle Support | kernel-0:2.6.18-436.el5 | Fixed | RHSA-2018:3822 |
| Red Hat Enterprise Linux 5.9 Long Life | kernel-0:2.6.18-348.42.1.el5 | Fixed | RHSA-2018:3823 |
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-754.3.5.el6 | Fixed | RHSA-2018:2390 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-862.el7 | Fixed | RHSA-2018:1062 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-862.rt56.804.el7 | Fixed | RHSA-2018:0676 |
| Red Hat Enterprise Linux 7.4 Extended Update Support | kernel-0:3.10.0-693.25.2.el7 | Fixed | RHSA-2018:1130 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.25.2.rt56.612.el6rt | Fixed | RHSA-2018:1170 |
| Red Hat Enterprise Linux 7 | kernel-alt | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6, 7, realtime and MRG-2. Red Hat Enterprise Linux 5 has transitioned to Production phase 3. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available. The official life cycle policy can be reviewed here: http://redhat.com/rhel/lifecycle Future Linux kernel updates for the respective releases may address this issue.
Red Hat mitigation
It is possible to prevent the affected code from being loaded by blacklisting the kernel module snd_seq. Instructions relating to how to blacklist a kernel module are shown here: https://access.redhat.com/solutions/41278 Alternatively a custom permission set can be created by udev, the correct permissions will depend on your use case. Please contact Red Hat customer support for creating a rule set that can minimize flaw exposure.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:L/AC:M/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 3, 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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.38% (0.00377) | 29.30th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00377) | 29.21th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.12% (0.00121) | 28.57th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.13% (0.03134) | 65.21th | v1 |
| Jan 6, 2022 | 3.13% (0.03134) | 64.87th | v1 |
| Sep 1, 2021 | 3.13% (0.03134) | 81.28th | v1 |
| Apr 14, 2021 | 3.13% (0.03134) | 0.00th | v1 |
References (26)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=71105998845fb012937332fe2e806d443c09e026 x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- http://mailman.alsa-project.org/pipermail/alsa-devel/2017-October/126292.html mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8 x_refsource_CONFIRMRelease NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2017/10/11/3 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/101288 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039561 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0676 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1062 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1130 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1170 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2390 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3822 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3823 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-15265 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1501878 Issue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=1062520 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/71105998845fb012937332fe2e806d443c09e026 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 x_refsource_CONFIRMThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-15265
- https://source.android.com/security/bulletin/2018-02-01 x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/3698-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3698-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-15265
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.