How severe is CVE-2021-26393?

CVE-2021-26393 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-26393 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26393?

CVE-2021-26393 primarily affects Amd Enterprise Driver. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26393?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26393 published?

CVE-2021-26393 was published on 2022-11-09 and last updated on 2026-06-17.

CVE-2021-26393

CVE-2021-26393 is a medium-severity vulnerability in Amd Enterprise Driver with a CVSS 3.x base score of 5.5. 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-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Amd Enterprise Driver
Published: 2022-11-09
Last modified: 2026-06-17

Description

Insufficient memory cleanup in the AMD Secure Processor (ASP) Trusted Execution Environment (TEE) may allow an authenticated attacker with privileges to generate a valid signed TA and potentially poison the contents of the process memory with attacker controlled data resulting in a loss of confidentiality.

Frequently asked questions

What is CVE-2021-26393?: Insufficient memory cleanup in the AMD Secure Processor (ASP) Trusted Execution Environment (TEE) may allow an authenticated attacker with privileges to generate a valid signed TA and potentially poison the contents of the process memory with attacker controlled data resulting in a loss of confidentiality.
How severe is CVE-2021-26393?: CVE-2021-26393 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-26393 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26393?: CVE-2021-26393 primarily affects Amd Enterprise Driver. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26393?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26393 published?: CVE-2021-26393 was published on 2022-11-09 and last updated on 2026-06-17.

References

Affected products (67)

cpe:2.3:a:amd:enterprise_driver:*:*:*:*:*:*:*:*
cpe:2.3:a:amd:radeon_pro_software:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:amd:radeon_software:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:radeon_rx_vega_56_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:radeon_rx_vega_64_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_2200ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_2200g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2400ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2400g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_silver_3050e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_pro_3045b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_silver_3050u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_silver_3050c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_pro_3145b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_gold_3150u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_gold_3150c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3250u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3250c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:amd_3020e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:amd_3015e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:amd_3015ce_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_2200u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_2300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2600h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_2700u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_2800h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3350u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3450u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3550h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3580u_firmware:-:*:*:*:*:*:*:*

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