CVE-2021-47347: wl1251: Fix possible buffer overflow in wl1251_cmd_scan
Vulnerability summary
CVE-2021-47347 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.81% chance of exploitation in the next 30 days, higher than 56.9% 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 7 · Related 7Timeline
- 21-05-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: wl1251: Fix possible buffer overflow in wl1251_cmd_scan Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.
CVSS metrics
4 scores · 4 sources · 1 version- 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
0.81%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.81% 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.
Ubuntu87 products
- linuxAll versions (No fix recorded) | < 4.15.0-156.163 | < 5.4.0-84.94
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1111.118 | < 5.4.0-1056.59
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < 57ad99ae3c6738ba87bad259bb57c641ca68ebf6 | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < d3d8b9c9c7843dce31e284927d4c9904fd5a510a | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < 0f6c0488368c9ac1aa685821916fadba32f5d1ef | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < 115103f6e3f1c26c473766c16439c7c8b235529a | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < d71dddeb5380613f9ef199f3e7368fd78fb1a46e | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < c5e4a10d7bd5d4f419d8b9705dff60cf69b302a1 | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < 302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < 40af3960a15339e8bbd3be50c3bc7b35e1a0b6ea | ≥ 2f01a1f58889fbfeb68b1bc1b52e4197f3333490, < d10a87a3535cce2b890897914f5d0d83df669c63 | 2.6.31
- linux_kernel< 4.4.276 | ≥ 4.5, < 4.9.276 | ≥ 4.10, < 4.14.240 | ≥ 4.15, < 4.19.198 | ≥ 4.20, < 5.4.133 | ≥ 5.5, < 5.10.51 | ≥ 5.11, < 5.12.18 | ≥ 5.13, < 5.13.3
Debian1 product
- linux< 5.14.6-1
3 vendors · 90 products
