CVE-2020-27418: fedoraproject fedora_linux_kernel Use After Free

CVSS: 4.4v3.1MediumModified

AliasesUBUNTU-CVE-2020-27418DEBIAN-CVE-2020-27418

Published 22-08-2023Last modified 09-07-2026

Vulnerability summary

CVE-2020-27418 is a medium (CVSS 4.4) Use After Free vulnerability in fedoraproject fedora_linux_kernel. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.2% of scored vulnerabilities.

Overall risk

18/100

0100

Low · default modelHow is this calculated?

CVSS score

4.4/10

010

Medium · v3.1 (NVD)

EPSS score

0.22%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits0No public exploits recorded

Timeline

22-08-2023
PublishedVulnerability first disclosed.
09-07-2026
Last modifiedVulnerability information updated.

Description

A Use After Free vulnerability in Fedora Linux kernel 5.9.0-rc9 allows attackers to obatin sensitive information via vgacon_invert_region() function.

CVSS metrics

3 scores · 3 sources · 1 version

v3.14.4

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 20-09-2026

20-09-202620-10-2026

EPSS score

0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Ubuntu75 products

linuxAll versions (No fix recorded) | < 4.4.0-178.208 | < 4.15.0-99.100
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.4.0-1066.70 | < 4.4.0-1106.117 | < 4.15.0-1066.70
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
linux-aws-hwe< 4.15.0-1066.70~16.04.1
linux-azure< 4.15.0-1082.92~14.04.1 | < 4.15.0-1082.92~16.04.1 | All versions (No fix recorded)
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded)
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 4.15.0-2006.7 | All versions (No fix recorded)
linux-fips< 4.4.0-1033.38 | All versions (No fix recorded) | < 4.15.0-1029.34
linux-gcp< 4.15.0-1061.65 | All versions (No fix recorded)
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-fipsAll versions (No fix recorded)
linux-gkeAll versions (No fix recorded)
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-99.100~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1070.77 | < 4.15.0-1059.60
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lts-xenial< 4.4.0-178.208~14.04.1
linux-nvidia-6.2All versions (No fix recorded)
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-osp1< 5.0.0-1050.55
linux-oracle< 4.15.0-1038.42~16.04.1 | < 4.15.0-1038.42
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.8All versions (No fix recorded)
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)

Show all 75

Debian1 product

linux< 5.5.13-1

Fedoraproject1 product

fedora_linux_kernel5.9.0:rc9

3 vendors · 77 products

References

5 links

patchwork.freedesktop.org/patch/356372/REPORTMailing ListPatch
ubuntu.com/security/CVE-2020-27418REPORT
git.kernel.org/linus/513dc792d6060d5ef572e43852683097a8420f56REPORT
www.cve.org/CVERecord?id=CVE-2020-27418REPORT
security-tracker.debian.org/tracker/CVE-2020-27418Advisory

Vulnerability summary

Timeline

Description

CVSS metrics

EPSS trend

Known exploited

Public exploits

Weaknesses

Affected systems

References

Related vulnerabilities