How severe is CVE-2020-12351?

CVE-2020-12351 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-12351 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12351?

CVE-2020-12351 primarily affects Linux Linux Kernel. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12351?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-12351 published?

CVE-2020-12351 was published on 2020-11-23 and last updated on 2026-06-17.

CVE-2020-12351

CVE-2020-12351 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 5.8
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Linux Linux Kernel
Published: 2020-11-23
Last modified: 2026-06-17

Description

Improper input validation in BlueZ may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access.

Frequently asked questions

What is CVE-2020-12351?: Improper input validation in BlueZ may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access.
How severe is CVE-2020-12351?: CVE-2020-12351 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-12351 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12351?: CVE-2020-12351 primarily affects Linux Linux Kernel. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12351?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-12351 published?: CVE-2020-12351 was published on 2020-11-23 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9.1:*:*:*:*:*:*:*

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