CVE-2021-47360: binder: make sure fd closes complete
Vulnerability summary
CVE-2021-47360 is a medium (CVSS 5.5) Unchecked Return Value vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.3% 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 5 · Related 5Timeline
- 21-05-2024PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: binder: make sure fd closes complete During BC_FREE_BUFFER processing, the BINDER_TYPE_FDA object cleanup may close 1 or more fds. The close operations are completed using the task work mechanism -- which means the thread needs to return to userspace or the file object may never be dereferenced -- which can lead to hung processes. Force the binder thread back to userspace if an fd is closed during BC_FREE_BUFFER handling.
CVSS metrics
4 scores · 3 sources · 2 versions- 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
0.25%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.25% 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< 5.4.0-91.102
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1060.63
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 80cd795630d6526ba729a089a435bf74a57af927, < aa2c274c279ff365a06a4cba263f04965895166e | ≥ 80cd795630d6526ba729a089a435bf74a57af927, < d5b0473707fa53b03a5db0256ce62b2874bddbc7 | ≥ 80cd795630d6526ba729a089a435bf74a57af927, < b95483d8d94b41fa31a84c1d86710b7907a37621 | ≥ 80cd795630d6526ba729a089a435bf74a57af927, < 5fdb55c1ac9585eb23bb2541d5819224429e103d | 27564d8d5d12d2ff197055346069c6bdbe08a8c2 | ≥ 4.20.1, < 4.21 | 5.0
- linux_kernel≥ 5.0, < 5.4.150 | ≥ 5.5, < 5.10.70 | ≥ 5.11, < 5.14.9 | 4.20.1 | 5.15:rc1 | 5.15:rc2
Debian1 product
- linux< 5.14.9-1
3 vendors · 86 products
