Kernel: ALSA: control: use-after-free in replacing user controls
Published Jul 3, 2014
4.9
MEDIUMCVSS 2.0
EPSS 0.49%
Description
The snd_ctl_elem_add function in sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 does not properly maintain the user_ctl_count value, which allows local users to cause a denial of service (integer overflow and limit bypass) by leveraging /dev/snd/controlCX access for a large number of SNDRV_CTL_IOCTL_ELEM_REPLACE ioctl calls.
Affected products
No data.
Configuration 1
- < 3.15.2
Configuration 2
- 10
Configuration 3
- 12.04
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-504.el6
Fixed · RHSA-2014:1392
Red Hat Enterprise Linux 7
kernel-0:3.10.0-123.13.1.el7
Fixed · RHSA-2014:1971
Red Hat Enterprise MRG 2
kernel-rt-0:3.10.33-rt32.45.el6rt
Fixed · RHSA-2014:1083
Red Hat Enterprise Linux 5
kernel
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-504.el6 | Fixed | RHSA-2014:1392 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-123.13.1.el7 | Fixed | RHSA-2014:1971 |
| Red Hat Enterprise MRG 2 | kernel-rt-0:3.10.33-rt32.45.el6rt | Fixed | RHSA-2014:1083 |
| Red Hat Enterprise Linux 5 | kernel | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2 may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:N/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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.49% (0.00494) | 40.12th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.49% (0.00494) | 38.27th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00038) | 8.16th | 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) |
References (18)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=82262a46627bebb0febcc26664746c25cef08563 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2014-1083.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/59434 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/59777 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/60545 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/60564 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.2 x_refsource_CONFIRMRelease NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2014/06/26/6 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/68162 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1036763 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2334-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2335-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2014-4655 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1113445 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/82262a46627bebb0febcc26664746c25cef08563 x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2014-4655
- https://www.cve.org/CVERecord?id=CVE-2014-4655
Change history (0)
No recorded changes yet.