kernel: memory leak in drivers/media/cec/core/cec-api.c
Published Sep 18, 2023
3.3
LOWCVSS 3.1
EPSS 0.24%
Description
An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct.
Affected products
No data.
- < 5.8.6
No data.
Cryostat 2
kernel
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Cryostat 2 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is to skip loading the affected module HDMI Consumer Electronics Control framework driver "cec" onto the system until we have a fix available. This can be done by a blacklist mechanism, which will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 25, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (6 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.24% (0.00240) | 13.71th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.23% (0.00226) | 13.09th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.01% (0.00011) | 0.69th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 10.81th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.04% (0.00043) | 9.24th | v3 (v2023.03.01) |
| Sep 19, 2023 | 0.04% (0.00043) | 7.20th | v3 (v2023.03.01) |
No CWE recorded.
References (6)
- https://access.redhat.com/security/cve/CVE-2020-36766 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2239712 Issue Tracking
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.6 Release Notes
- https://github.com/torvalds/linux/commit/6c42227c3467549ddc65efe99c869021d2f4a570 Patch
- https://nvd.nist.gov/vuln/detail/CVE-2020-36766
- https://www.cve.org/CVERecord?id=CVE-2020-36766
Change history (0)
No recorded changes yet.