5.5

CVE-2021-47442: NFC: digital: fix possible memory leak in digital_in_send_sdd_req()

Analyzed
AliasesUBUNTU-CVE-2021-47442DEBIAN-CVE-2021-47442
Published 22-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47442 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.23%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
SUSE-SU-2024:2008-1SUSE-SU-2024:2010-1SUSE-SU-2024:2011-1SUSE-SU-2024:2019-1SUSE-SU-2024:2183-1SUSE-SU-2024:2185-1

Timeline

  1. 22-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: NFC: digital: fix possible memory leak in digital_in_send_sdd_req() 'skb' is allocated in digital_in_send_sdd_req(), but not free when digital_in_send_cmd() failed, which will cause memory leak. Fix it by freeing 'skb' if digital_in_send_cmd() return failed.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.23% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

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) | < 4.15.0-166.174 | < 5.4.0-92.103
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1118.125 | < 5.4.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 74569c78aa84f8c958f1334b465bc530906ec99a | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 88c890b0b9a1fb9fcd01c61ada515e8b636c34f9 | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < fcce6e5255474ca33c27dda0cdf9bf5087278873 | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 071bdef36391958c89af5fa2172f691b31baa212 | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 2bde4aca56db9fe25405d39ddb062531493a65db | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 50cb95487c265187289810addec5093d4fed8329 | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 6432d7f1d1c3aa74cfe8f5e3afdf81b786c32e86 | ≥ 2c66daecc4092e6049673c281b2e6f0d5e59a94c, < 291c932fc3692e4d211a445ba8aa35663831bac7 | 3.13
  • linux_kernel≥ 3.13, < 4.4.290 | ≥ 4.5, < 4.9.288 | ≥ 4.10, < 4.14.252 | ≥ 4.15, < 4.19.213 | ≥ 4.20, < 5.4.155 | ≥ 5.5, < 5.10.75 | ≥ 5.11, < 5.14.14 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3 | 5.15:rc4 | 5.15:rc5
Debian1 product
  • linux< 5.14.16-1

3 vendors · 90 products

References

12 links
Show all 12 references