CVE-2021-47296

MEDIUMNVD 5.55.5—

5.5

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

KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak

vcpu_put is not called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 1.4%
KEV: Not listed

Published

May 21, 2024

Last Modified

June 23, 2025

References (10)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9bafc34dc4ad0cef18727c557f21ed3c3304df50
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4a488915feaad38345cc01b80d52e8200ff5209
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc4188a2f56e821ea057aca6bf444e138d06c252
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e14ef1095387f764d95614d3ec9e4d07c82a3533
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f38527f1890543cdfca8dfd06f75f9887cce6151
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9bafc34dc4ad0cef18727c557f21ed3c3304df50
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a4a488915feaad38345cc01b80d52e8200ff5209
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bc4188a2f56e821ea057aca6bf444e138d06c252
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e14ef1095387f764d95614d3ec9e4d07c82a3533
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f38527f1890543cdfca8dfd06f75f9887cce6151

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 9× in last 7d / 17× 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 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 01:35 UTCEG score recompute
2026-05-24 01:35 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-47296?

CVE-2021-47296 is a medium vulnerability published on May 21, 2024. In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Fix kvmarchvcpuioctl vcpuload leak vcpu_put is not called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues.

When was CVE-2021-47296 disclosed?

CVE-2021-47296 was first published in the National Vulnerability Database on May 21, 2024, with the most recent update on June 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-47296 actively exploited?

CVE-2021-47296 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-47296?

CVE-2021-47296 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-47296?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47296, 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.

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CVE-2021-47296

📅 Published

🔄 Last Modified

🔗 References (10)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-47296?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (10)

Frequently asked(5)

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