5.5

CVE-2021-47602: linux Access of Uninitialized Pointer

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-47602DEBIAN-CVE-2021-47602
Published 19-06-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2021-47602 is a medium (CVSS 5.5) Access of Uninitialized Pointer vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 12
SUSE-SU-2024:2360-1SUSE-SU-2024:2362-1SUSE-SU-2024:2372-1SUSE-SU-2024:2381-1SUSE-SU-2024:2384-1SUSE-SU-2024:2394-1

Timeline

  1. 19-06-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mac80211: track only QoS data frames for admission control For admission control, obviously all of that only works for QoS data frames, otherwise we cannot even access the QoS field in the header. Syzbot reported (see below) an uninitialized value here due to a status of a non-QoS nullfunc packet, which isn't even long enough to contain the QoS header. Fix this to only do anything for QoS data packets.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu88 products
  • linux< 4.4.0-267.301 | < 4.15.0-169.177 | < 5.4.0-105.119
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1142.148 | < 4.4.0-1180.195 | < 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≥ 02219b3abca59fca81711bfe7ee78df7abad97ce, < 69f054d6642c8f6173724ce17e7ee3ff66b8f682 | ≥ 02219b3abca59fca81711bfe7ee78df7abad97ce, < 46b9e29db2012a4d2a40a26101862e002ccf387b | ≥ 02219b3abca59fca81711bfe7ee78df7abad97ce, < eed897a22230e3231a740eddd7d6d95ba476625f | ≥ 02219b3abca59fca81711bfe7ee78df7abad97ce, < 42d08e97b196479f593499e887a9ab81446a34b9 | ≥ 02219b3abca59fca81711bfe7ee78df7abad97ce, < d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a | 3.19
  • linux_kernel≥ 3.19, < 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 · 91 products

References

11 links
Show all 11 references