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Fencer Vulns
low 3.3

CVE-2020-36766 json

An issue was discovered in the Linux kernel before 5.8.6.

published 2023-09-18 3 y ago modified 2026-06-17 4 mo ago also EUVD-2020-24207

cvss
3.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux linux_kernel 5.8.6
  • linux Debian 14, Debian 13, Debian 12 5.8.7-1

debian advisories DEBIAN-CVE-2020-36766

  • linux Ubuntu 18.04 LTS 4.15.0-121.123
  • linux Ubuntu 20.04 LTS 5.4.0-51.56
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1086.91
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1028.29
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1086.98~16.04.1
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1028.29
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-120.122~16.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1077.79

ubuntu advisories UBUNTU-CVE-2020-36766

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-default SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE Live Patching 15 SP1 +3 more 4.12.14-150100.197.160.1
  • kernel-vanilla openSUSE Leap 15.5, openSUSE Leap 15.4 4.12.14-150100.197.160.1
  • kernel-kvmsmall openSUSE Leap 15.4 4.12.14-150100.197.160.1
  • kernel-zfcpdump SLES 15 SP1-LTSS, openSUSE Leap 15.4 4.12.14-150100.197.160.1
  • kernel-rt SLE Micro 5.2, SLE Micro 5.1 5.3.18-150300.144.1
  • kernel-64kb SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS, SLE High Performance Computing 15 SP3-ESPOS +1 more 5.3.18-150300.59.138.1
  • kernel-syms SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +2 more 5.3.18-150300.59.138.1
  • kernel-source SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +4 more 5.3.18-150300.59.138.1

suse advisories SUSE-SU-2023:4347-1SUSE-SU-2023:4142-1SUSE-SU-2023:4095-1SUSE-SU-2023:4033-1SUSE-SU-2023:4032-1SUSE-SU-2023:4031-1

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-2020-36766 updated cvss 3.3

kernel: memory leak in drivers/media/cec/core/cec-api.c

  • Red Hat Cryostat 2 kernel kernel Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +30 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Classification

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.