CVE-2021-47177: iommu/vt-d: Fix sysfs leak in alloc_iommu()
Vulnerability summary
CVE-2021-47177 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.9% 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
- 25-03-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix sysfs leak in alloc_iommu() iommu_device_sysfs_add() is called before, so is has to be cleaned on subsequent errors.
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.
Ubuntu85 products
- linux< 4.15.0-151.157 | < 5.4.0-80.90
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.15.0-1109.116 | < 5.4.0-1054.57
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 39ab9555c24110671f8dc671311a26e5c985b592, < 22da9f4978381a99f1abaeaf6c9b83be6ab5ddd8 | ≥ 39ab9555c24110671f8dc671311a26e5c985b592, < 2ec5e9bb6b0560c90d315559c28a99723c80b996 | ≥ 39ab9555c24110671f8dc671311a26e5c985b592, < 044bbe8b92ab4e542de7f6c93c88ea65cccd8e29 | ≥ 39ab9555c24110671f8dc671311a26e5c985b592, < f01134321d04f47c718bb41b799bcdeda27873d2 | ≥ 39ab9555c24110671f8dc671311a26e5c985b592, < ca466561eef36d1ec657673e3944eb6340bddb5b | ≥ 39ab9555c24110671f8dc671311a26e5c985b592, < 0ee74d5a48635c848c20f152d0d488bf84641304 | 4.11
- linux_kernel≥ 4.11, < 4.14.235 | ≥ 4.15, < 4.19.193 | ≥ 4.20, < 5.4.124 | ≥ 5.5, < 5.10.42 | ≥ 5.11, < 5.12.9 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3
Debian1 product
- linux< 5.14.6-1
3 vendors · 88 products
