How severe is CVE-2021-47420?

CVE-2021-47420 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 none, integrity none, and availability high.

Is CVE-2021-47420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47420?

CVE-2021-47420 primarily affects Linux Linux Kernel. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-47420?

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

Does CVE-2021-47420 have an EU (EUVD) identifier?

Yes. CVE-2021-47420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34425.

When was CVE-2021-47420 published?

CVE-2021-47420 was published on 2024-05-21 and last updated on 2026-06-17.

CVE-2021-47420

CVE-2021-47420 is a medium-severity vulnerability in Linux Linux Kernel 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% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34425
Weakness: CWE-401
Affected product: Linux Linux Kernel
Published: 2024-05-21
Last modified: 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix a potential ttm->sg memory leak Memory is allocated for ttm->sg by kmalloc in kfd_mem_dmamap_userptr, but isn't freed by kfree in kfd_mem_dmaunmap_userptr. Free it!

Frequently asked questions

What is CVE-2021-47420?: In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix a potential ttm->sg memory leak Memory is allocated for ttm->sg by kmalloc in kfd_mem_dmamap_userptr, but isn't freed by kfree in kfd_mem_dmaunmap_userptr. Free it!
How severe is CVE-2021-47420?: CVE-2021-47420 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 none, integrity none, and availability high.
Is CVE-2021-47420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47420?: CVE-2021-47420 primarily affects Linux Linux Kernel. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-47420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47420 have an EU (EUVD) identifier?: Yes. CVE-2021-47420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34425.
When was CVE-2021-47420 published?: CVE-2021-47420 was published on 2024-05-21 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*

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