CVE-2021-47571: linux Use After Free
CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2021-47571DEBIAN-CVE-2021-47571
Published 24-05-2024Last modified 11-05-2026
Vulnerability summary
CVE-2021-47571 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.3% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 12 · Related 12Timeline
- 24-05-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect() The free_rtllib() function frees the "dev" pointer so there is use after free on the next line. Re-arrange things to avoid that.
CVSS metrics
3 scores · 3 sources · 1 versionHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- 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
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
0.00 pp
From 0.21% on 21-09-2026
21-09-202621-10-2026
EPSS score0.21%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu88 products
- linuxAll versions (No fix recorded) | < 4.4.0-258.292 | < 4.15.0-169.177 | < 5.4.0-100.113
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1135.141 | < 4.4.0-1173.188 | < 4.15.0-1121.129 | < 5.4.0-1066.69
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < d43aecb694b10db9a4228ce2d38b5ae8de374443 | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < 9186680382934b0e7529d3d70dcc0a21d087683b | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < c0ef0e75a858cbd8618b473f22fbca36106dcf82 | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < bca19bb2dc2d89ce60c4a4a6e59609d4cf2e13ef | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < 2e1ec01af2c7139c6a600bbfaea1a018b35094b6 | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < 8d0163cec7de995f9eb9c3128c83fb84f0cb1c64 | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < e27ee2f607fe6a9b923ef1fc65461c0613c97594 | ≥ 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < b535917c51acc97fb0761b1edec85f1f3d02bda4 | 3.2
- linux_kernel≥ 3.2, < 4.4.294 | ≥ 4.5, < 4.9.292 | ≥ 4.10, < 4.14.257 | ≥ 4.15, < 4.19.219 | ≥ 4.20, < 5.4.163 | ≥ 5.5, < 5.10.83 | ≥ 5.11, < 5.15.6
Debian1 product
- linux< 5.15.15-1
3 vendors · 91 products
