5.5

CVE-2021-47009: KEYS: trusted: Fix memory leak on object td

Analyzed
AliasesUBUNTU-CVE-2021-47009DEBIAN-CVE-2021-47009
Published 28-02-2024Last modified 23-05-2026

Vulnerability summary

CVE-2021-47009 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.9% 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
0.25%
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 2 · Related 2
SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1

Timeline

  1. 28-02-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix memory leak on object td Two error return paths are neglecting to free allocated object td, causing a memory leak. Fix this by returning via the error return path that securely kfree's td. Fixes clang scan-build warning: security/keys/trusted-keys/trusted_tpm1.c:496:10: warning: Potential memory leak [unix.Malloc]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 9d83cc1a1e7f494aedee2aa108e801d11525fccf, < 31c9a4b24d86cbb36ff0d7a085725a3b4f0138c8 | ≥ 8cfc8d62942105e5df4a20a15b24da077a6b24ef, < 1c4031014106aff48e1e686e40101c31eab5d44c | ≥ 5df16caada3fba3b21cb09b85cdedf99507f4ec1, < 3e24fbd37e72e8a67b74991970fecc82d14f57af | ≥ 5df16caada3fba3b21cb09b85cdedf99507f4ec1, < 83a775d5f9bfda95b1c295f95a3a041a40c7f321 | ≥ 5.10.20, < 5.10.38 | ≥ 5.11.3, < 5.11.22 | 5.12
  • linux_kernel≥ 5.10.20, < 5.10.38 | ≥ 5.11.3, < 5.11.22 | ≥ 5.12, < 5.12.5 | 5.12:rc1
Debian1 product
  • linux< 5.10.38-1

3 vendors · 65 products

References

8 links