kernel: timing side channel vulnerability in the Linux Extended Verification Module
Published Apr 27, 2016
5.5
MEDIUMCVSS 3.0
EPSS 0.44%
Description
The evm_verify_hmac function in security/integrity/evm/evm_main.c in the Linux kernel before 4.5 does not properly copy data, which makes it easier for local users to forge MAC values via a timing side-channel attack.
Affected products
No data.
- ≤ 4.4.8
No data.
Red Hat Enterprise Linux 4
kernel
Not affected
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4,5 and 6. This issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7 and kernel-rt packages and does not plan to be addressed in a future update.
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:N/I:H/A:N
AV:L/AC:L/Au:N/C:N/I:P/A:N
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 | 0.44% (0.00442) | 36.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.44% (0.00442) | 34.98th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00059) | 15.67th | 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 (16)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=613317bd212c585c20796c10afe5daaa95d4b0a1 x_refsource_CONFIRMVendor Advisory
- http://www.ubuntu.com/usn/USN-2946-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2946-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2947-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2947-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2947-3 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2948-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2948-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2949-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-2085 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1324867 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/613317bd212c585c20796c10afe5daaa95d4b0a1 x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-2085
- https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2085.html x_refsource_CONFIRM
- https://security-tracker.debian.org/tracker/CVE-2016-2085 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2016-2085
Change history (0)
No recorded changes yet.