kernel: File descriptors passed over unix sockets are not properly accounted
Published Feb 8, 2016
6.2
MEDIUMCVSS 3.0
EPSS 0.60%
Description
The Linux kernel before 4.4.1 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by sending each descriptor over a UNIX socket before closing it, related to net/unix/af_unix.c and net/unix/garbage.c.
Affected products
No data.
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-642.el6
Fixed · RHSA-2016:0855
Red Hat Enterprise Linux 7
kernel-0:3.10.0-514.el7
Fixed · RHSA-2016:2574
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-514.rt56.420.el7
Fixed · RHSA-2016:2584
Red Hat Enterprise Linux 5
kernel
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-642.el6 | Fixed | RHSA-2016:0855 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-514.el7 | Fixed | RHSA-2016:2574 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-514.rt56.420.el7 | Fixed | RHSA-2016:2584 |
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | 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 6, 7, and MRG-2. Future Linux kernel updates for the respective releases might address this issue. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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:N/UI:N/S:U/C:N/I:N/A:H
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 3, 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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.60% (0.00595) | 46.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.60% (0.00600) | 43.87th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00025) | 4.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.15% (0.00148) | 52.23th | v3 (v2023.03.01) |
| Aug 22, 2023 | 0.15% (0.00148) | 50.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00104) | 40.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (23)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=712f4aad406bb1ed67f3f98d04c044191f0ff593 x_refsource_CONFIRMVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176464.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html vendor-advisoryx_refsource_FEDORA
- http://rhn.redhat.com/errata/RHSA-2016-0855.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2574.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2584.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2016/dsa-3448 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2016/dsa-3503 vendor-advisoryx_refsource_DEBIAN
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1 x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/82986 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-2929-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2929-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2931-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2932-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2967-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2967-2 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2013-4312 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1297813 x_refsource_CONFIRMIssue TrackingThird Party AdvisoryVDB Entry
- https://github.com/torvalds/linux/commit/712f4aad406bb1ed67f3f98d04c044191f0ff593 x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2013-4312
- https://security-tracker.debian.org/tracker/CVE-2013-4312 x_refsource_CONFIRMThird Party AdvisoryVDB Entry
- https://www.cve.org/CVERecord?id=CVE-2013-4312
Change history (0)
No recorded changes yet.