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Fencer Vulns
high 7.8

CVE-2018-7566 json

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.

published 2018-03-30 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19291

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.15.11-1

debian advisories DEBIAN-CVE-2018-7566

  • linux Ubuntu 14.04 LTS 3.13.0-161.211
  • linux Ubuntu 16.04 LTS 4.4.0-127.153
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1022.22
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1060.69
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1014.14~16.04.1
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-24.26~16.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1026.31
  • linux-azure Ubuntu 16.04 LTS 4.15.0-1013.13~16.04.2

ubuntu advisories UBUNTU-CVE-2018-7566

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-alt RHEL 7 4.14.0-115.el7a
  • perf RHEL 7 4.14.0-115.el7a
  • kernel RHEL 7 4.14.0-115.el7a
  • python-perf RHEL 7 4.14.0-115.el7a
  • kernel-tools RHEL 7 4.14.0-115.el7a
  • kernel-tools-libs RHEL 7 4.14.0-115.el7a
  • kernel-bootwrapper RHEL 7 4.14.0-115.el7a
  • kernel-abi-whitelists RHEL 7 4.14.0-115.el7a

red hat advisories RHSA-2018:2948RHSA-2018:2390RHSA-2019:1487RHSA-2019:1483RHSA-2018:2395RHSA-2018:2384

  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-69.24.1
  • kernel-syms-rt SLE Real Time 11 SP4 3.0.101.rt130-69.24.1
  • kernel-rt_trace SLE Real Time 11 SP4 3.0.101.rt130-69.24.1
  • kernel-source-rt SLE Real Time 11 SP4 3.0.101.rt130-69.24.1
  • kernel-ec2 SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.22.1
  • kernel-pae SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.22.1
  • kernel-xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.22.1
  • kernel-syms SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.22.1

suse advisories SUSE-SU-2018:1309-1SUSE-SU-2018:1172-1SUSE-SU-2018:1080-1SUSE-SU-2018:1007-1SUSE-SU-2018:1019-1SUSE-SU-2018:1016-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-7566 updated cvss 6.1

kernel: race condition in snd_seq_write() may lead to UAF or OOB-access

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-862.11.6.el7, kernel 3.10.0-862.11.6.el7, python-perf 3.10.0-862.11.6.el7, kernel-tools 3.10.0-862.11.6.el7, kernel-tools-libs 3.10.0-862.11.6.el7, kernel-abi-whitelists 3.10.0-862.11.6.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.11.6.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-862.11.6.el7, kernel 3.10.0-862.11.6.el7, python-perf 3.10.0-862.11.6.el7, kernel-tools 3.10.0-862.11.6.el7, kernel-tools-libs 3.10.0-862.11.6.el7, kernel-abi-whitelists 3.10.0-862.11.6.el7, +1 more
    fixed: vendor fix RHSA-2018:2384
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) perf 3.10.0-693.50.3.el7, kernel 3.10.0-693.50.3.el7, python-perf 3.10.0-693.50.3.el7, kernel-tools 3.10.0-693.50.3.el7, kernel-tools-libs 3.10.0-693.50.3.el7, kernel-abi-whitelists 3.10.0-693.50.3.el7, +1 more
    fixed: vendor fix RHSA-2019:1483
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.11.6.el7
    fixed: vendor fix RHSA-2018:2384
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.50.3.el7
    fixed: vendor fix RHSA-2019:1483
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-754.3.5.el6, kernel 2.6.32-754.3.5.el6, kernel-firmware 2.6.32-754.3.5.el6, kernel-abi-whitelists 2.6.32-754.3.5.el6, kernel-debuginfo-common-i686 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-754.3.5.el6, kernel-debuginfo-common-i686 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6
    fixed: vendor fix RHSA-2018:2390
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.el7a, kernel 4.14.0-115.el7a, perf 3.10.0-862.11.6.el7, kernel 3.10.0-862.11.6.el7, kernel-alt 4.14.0-115.el7a, python-perf 4.14.0-115.el7a, +13 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.el7a, kernel-debuginfo-common-ppc64le 3.10.0-862.11.6.el7
    fixed: vendor fix RHSA-2018:2384
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-862.11.6.rt56.819.el7, kernel-rt-kvm 3.10.0-862.11.6.rt56.819.el7, kernel-rt-trace 3.10.0-862.11.6.rt56.819.el7, kernel-rt-debug-kvm 3.10.0-862.11.6.rt56.819.el7, kernel-rt-trace-kvm 3.10.0-862.11.6.rt56.819.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-862.11.6.rt56.819.el7
    fixed: vendor fix RHSA-2018:2395
  • Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-754.3.5.el6, kernel 2.6.32-754.3.5.el6, kernel-firmware 2.6.32-754.3.5.el6, kernel-abi-whitelists 2.6.32-754.3.5.el6, kernel-debuginfo-common-i686 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6
    fixed: vendor fix RHSA-2018:2390
show 13 more
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-862.11.6.rt56.819.el7, kernel-rt-trace 3.10.0-862.11.6.rt56.819.el7
    fixed: vendor fix RHSA-2018:2395
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-754.3.5.el6, kernel 2.6.32-754.3.5.el6, kernel-kdump 2.6.32-754.3.5.el6, kernel-firmware 2.6.32-754.3.5.el6, kernel-bootwrapper 2.6.32-754.3.5.el6, kernel-abi-whitelists 2.6.32-754.3.5.el6, +4 more
    fixed: vendor fix RHSA-2018:2390
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-862.11.6.el7, kernel 3.10.0-862.11.6.el7, python-perf 3.10.0-862.11.6.el7, kernel-kdump 3.10.0-862.11.6.el7, kernel-tools 3.10.0-862.11.6.el7, kernel-tools-libs 3.10.0-862.11.6.el7, +6 more
    fixed: vendor fix RHSA-2018:2384
  • Red Hat Enterprise Linux Server EUS (v. 7.4) perf 3.10.0-693.50.3.el7, kernel 3.10.0-693.50.3.el7, python-perf 3.10.0-693.50.3.el7, kernel-kdump 3.10.0-693.50.3.el7, kernel-tools 3.10.0-693.50.3.el7, kernel-tools-libs 3.10.0-693.50.3.el7, +6 more
    fixed: vendor fix RHSA-2019:1483
  • Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-754.3.5.el6, kernel-debuginfo-common-i686 2.6.32-754.3.5.el6, kernel-debuginfo-common-ppc64 2.6.32-754.3.5.el6, kernel-debuginfo-common-s390x 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6
    fixed: vendor fix RHSA-2018:2390
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-862.11.6.el7, kernel-debuginfo-common-x86_64 3.10.0-862.11.6.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.11.6.el7
    fixed: vendor fix RHSA-2018:2384
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debuginfo-common-ppc64 3.10.0-693.50.3.el7, kernel-debuginfo-common-x86_64 3.10.0-693.50.3.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.50.3.el7
    fixed: vendor fix RHSA-2019:1483
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-754.3.5.el6, kernel 2.6.32-754.3.5.el6, kernel-firmware 2.6.32-754.3.5.el6, kernel-abi-whitelists 2.6.32-754.3.5.el6, kernel-debuginfo-common-i686 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6
    fixed: vendor fix RHSA-2018:2390
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-862.11.6.el7, kernel 3.10.0-862.11.6.el7, python-perf 3.10.0-862.11.6.el7, kernel-tools 3.10.0-862.11.6.el7, kernel-tools-libs 3.10.0-862.11.6.el7, kernel-abi-whitelists 3.10.0-862.11.6.el7, +1 more
    fixed: vendor fix RHSA-2018:2384
  • Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-754.3.5.el6, kernel-debuginfo-common-i686 2.6.32-754.3.5.el6, kernel-debuginfo-common-x86_64 2.6.32-754.3.5.el6
    fixed: vendor fix RHSA-2018:2390
  • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.11.6.el7
    fixed: vendor fix RHSA-2018:2384
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-693.50.3.rt56.644.el6rt, kernel-rt-trace 3.10.0-693.50.3.rt56.644.el6rt, kernel-rt-vanilla 3.10.0-693.50.3.rt56.644.el6rt, kernel-rt-firmware 3.10.0-693.50.3.rt56.644.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-693.50.3.rt56.644.el6rt
    fixed: vendor fix RHSA-2019:1487
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.