kernel: race condition in snd_seq_write() may lead to UAF or OOB-access
Published Mar 30, 2018
7.8
HIGHCVSS 3.0
EPSS 0.47%
Description
The Linux kernel 4.15 has a Buffer Overflow via an SNDRV_SEQ_IOCTL_SET_CLIENT_POOL ioctl write operation to /dev/snd/seq by a local user.
Affected products
No data.
Configuration 1
- 4.15
Configuration 2
- 12
- 12
Configuration 3
- 12.04
- 14.04
- 16.04
Configuration 4
- 7.0
- 8.0
- 9.0
Configuration 5
- 6.0
- 7.0
- 6.0
- 7.0
- 7.6
- 7.5
- 7.6
- 7.6
- 6.0
- 7.0
Configuration 6
- 16.1.0
- 16.2.0
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-754.3.5.el6
Fixed · RHSA-2018:2390
Red Hat Enterprise Linux 7
kernel-0:3.10.0-862.11.6.el7
Fixed · RHSA-2018:2384
Red Hat Enterprise Linux 7
kernel-alt-0:4.14.0-115.el7a
Fixed · RHSA-2018:2948
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-862.11.6.rt56.819.el7
Fixed · RHSA-2018:2395
Red Hat Enterprise Linux 7.4 Extended Update Support
kernel-0:3.10.0-693.50.3.el7
Fixed · RHSA-2019:1483
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.50.3.rt56.644.el6rt
Fixed · RHSA-2019:1487
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-754.3.5.el6 | Fixed | RHSA-2018:2390 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-862.11.6.el7 | Fixed | RHSA-2018:2384 |
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.14.0-115.el7a | Fixed | RHSA-2018:2948 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-862.11.6.rt56.819.el7 | Fixed | RHSA-2018:2395 |
| Red Hat Enterprise Linux 7.4 Extended Update Support | kernel-0:3.10.0-693.50.3.el7 | Fixed | RHSA-2019:1483 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.50.3.rt56.644.el6rt | Fixed | RHSA-2019:1487 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5. This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. Future Linux kernel 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
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
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 1, 2026 | 0.47% (0.00473) | 38.64th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.50% (0.00500) | 38.65th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00029) | 5.10th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.92th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.04% (0.00044) | 10.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.31th | 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 | 2.42% (0.02421) | 53.88th | v1 |
| Jan 6, 2022 | 2.42% (0.02421) | 53.43th | v1 |
| Sep 1, 2021 | 2.42% (0.02421) | 78.37th | v1 |
| Apr 14, 2021 | 2.42% (0.02421) | 0.00th | v1 |
References (24)
- http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00067.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://mailman.alsa-project.org/pipermail/alsa-devel/2018-February/132026.html mailing-listx_refsource_MLISTPatchThird Party Advisory
- http://www.securityfocus.com/bid/103605 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2384 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-2018:2395 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2948 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1483 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:1487 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2018-7566 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1550142 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d15d662e89fc667b90cd294b0eb45694e33144da x_refsource_CONFIRMPatchVendor 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/2018/05/msg00000.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-7566
- https://usn.ubuntu.com/3631-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3631-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3798-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3798-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-7566
- https://www.debian.org/security/2018/dsa-4187 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.debian.org/security/2018/dsa-4188 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISC
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.