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CVE-2021-47529

17
FAUCET Score

CVE-2021-47529 is a memory leak vulnerability in the iwlwifi driver of the Linux kernel, affecting various Linux kernel versions. This flaw occurs in error handling paths where allocated memory is not properly freed, leading to resource exhaustion. Rated as Medium severity (CVSS 5.5), it requires local access and low privileges to exploit, potentially resulting in a denial-of-service condition. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.14, < 5.15.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
10.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 50th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2021-47529Low

kernel: iwlwifi: Fix memory leaks in error handling path

May 24, 2024

References

git.kernel.org / stable/c/4768935c25403ba96e7a745645df24a51a774b7e
Patch
git.kernel.org / stable/c/a571bc28326d9f3e13f5f2d9cda2883e0631b0ce
Patch