CVE-2021-47033

MEDIUMNVD 5.55.5—

5.5

In the Linux kernel, the following vulnerability has been resolved:

mt76: mt7615: fix tx skb dma unmap

The first pointer in the txp needs to be unmapped as well, otherwise it will leak DMA mapping entries

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 5.3%
KEV: Not listed

Published

February 28, 2024

Last Modified

December 12, 2024

References (8)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75bc5f779a7664d1fc19cb915039439c6e58bb94
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/821ae236ccea989a1fcc6abfc4d5b74ad4ba39d2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a025277a80add18c33d01042525a74fe5b875f25
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebee7885bb12a8fe2c2f9bac87dbd87a05b645f9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/75bc5f779a7664d1fc19cb915039439c6e58bb94
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/821ae236ccea989a1fcc6abfc4d5b74ad4ba39d2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a025277a80add18c33d01042525a74fe5b875f25
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ebee7885bb12a8fe2c2f9bac87dbd87a05b645f9

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-401Missing Release of Memory after Effective Lifetime (Memory Leak)

Data Freshness Timeline

(refreshed 10× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 07:42 UTCEG score recompute
2026-05-24 07:42 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-47033?

CVE-2021-47033 is a medium vulnerability published on February 28, 2024. In the Linux kernel, the following vulnerability has been resolved: mt76: mt7615: fix tx skb dma unmap The first pointer in the txp needs to be unmapped as well, otherwise it will leak DMA mapping entries

When was CVE-2021-47033 disclosed?

CVE-2021-47033 was first published in the National Vulnerability Database on February 28, 2024, with the most recent update on December 12, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-47033 actively exploited?

CVE-2021-47033 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-47033?

CVE-2021-47033 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-47033?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47033, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-47033

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-47033?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)