CVE-2021-47600: dm btree remove: fix use after free in rebalance_children()
Vulnerability summary
CVE-2021-47600 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.7% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 28 · Related 27Timeline
- 19-06-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: dm btree remove: fix use after free in rebalance_children() Move dm_tm_unlock() after dm_tm_dec().
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% 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.
Ubuntu89 products
- linuxAll versions (No fix recorded) | < 4.15.0-169.177 | < 5.4.0-105.119
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1121.129 | < 5.4.0-1069.73
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < a48f6a2bf33734ec5669ee03067dfb6c5b4818d6 | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < 66ea642af6fd4eacb5d0271a922130fcf8700424 | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < b03abd0aa09c05099f537cb05b8460c4298f0861 | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < 293f957be5e39720778fb1851ced7f5fba6d51c3 | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < 501ecd90efdc9b2edc6c28852ecd098a4adf8f00 | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < 0e21e6cd5eebfc929ac5fa3b97ca2d4ace3cb6a3 | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < 607beb420b3fe23b948a9bf447d993521a02fbbb | ≥ 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4, < 1b8d2789dad0005fd5e7d35dab26a8e1203fb6da | 3.2
- linux_kernel< 4.4.296 | ≥ 4.5, < 4.9.294 | ≥ 4.10, < 4.14.259 | ≥ 4.15, < 4.19.222 | ≥ 4.20, < 5.4.168 | ≥ 5.5, < 5.10.88 | ≥ 5.11, < 5.15.11
Debian1 product
- linux< 5.15.15-1
3 vendors · 92 products
