CVE-2021-47071: uio_hv_generic: Fix a memory leak in error handling paths
Vulnerability summary
CVE-2021-47071 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.5% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 01-03-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix a memory leak in error handling paths If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be updated and 'hv_uio_cleanup()' in the error handling path will not be able to free the corresponding buffer. In such a case, we need to free the buffer explicitly.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu83 products
- linux< 5.4.0-80.90
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1054.57
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ cdfa835c6e5e87d145f9f632b58843de97509f2b, < cdd91637d4ef33e2be19a8e16e72e7d00c996d76 | ≥ cdfa835c6e5e87d145f9f632b58843de97509f2b, < d84b5e912212b05f6b5bde9f682046accfbe0354 | ≥ cdfa835c6e5e87d145f9f632b58843de97509f2b, < 53486c467e356e06aa37047c984fccd64d78c827 | ≥ cdfa835c6e5e87d145f9f632b58843de97509f2b, < 3ee098f96b8b6c1a98f7f97915f8873164e6af9d | 4.20
- linux_kernel≥ 4.20, < 5.4.122 | ≥ 5.5, < 5.10.40 | ≥ 5.11, < 5.12.7 | 5.13:rc1 | 5.13:rc2
Debian1 product
- linux< 5.10.40-1
3 vendors · 86 products
