CVE-2021-47611: mac80211: validate extended element ID is present
Vulnerability summary
CVE-2021-47611 is a high (CVSS 8.1) vulnerability in linux. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 27.2% of scored vulnerabilities.
Not severe (CVSS 8.1, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 7Timeline
- 19-06-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: mac80211: validate extended element ID is present Before attempting to parse an extended element, verify that the extended element ID is present.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/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:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.34%
Chance of exploitation in the next 30 days
Percentile
27%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.34% 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 causeNo weakness data has been published for this record.
Affected systems
Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu84 products
- linux< 5.4.0-105.119
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1069.73
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 41cbb0f5a29592874355e4159489eb08337cd50e, < 03029bb044ccee60adbc93e70713f3ae58abc3a1 | ≥ 41cbb0f5a29592874355e4159489eb08337cd50e, < a19cf6844b509d44ecbd536f33d314d91ecdd2b5 | ≥ 41cbb0f5a29592874355e4159489eb08337cd50e, < 7fd214fc7f2ee3a89f91e717e3cfad55f5a27045 | ≥ 41cbb0f5a29592874355e4159489eb08337cd50e, < c62b16f98688ae7bc0ab23a6490481f4ce9b3a49 | ≥ 41cbb0f5a29592874355e4159489eb08337cd50e, < 768c0b19b50665e337c96858aa2b7928d6dcf756 | 4.19
- linux_kernel≥ 4.19, < 4.19.222 | ≥ 4.20, < 5.4.168 | ≥ 5.5, < 5.10.88 | ≥ 5.11, < 5.15.11 | 5.16:rc1 | 5.16:rc2 | 5.16:rc3 | 5.16:rc4 | 5.16:rc5
Debian1 product
- linux< 5.15.15-1
3 vendors · 87 products
