TI-2021-21674 Aliases CVE-2021-47009 GHSA-fq4x-x6f2-9q95

KEYS: trusted: Fix memory leak on object td

LOW 24CWE-401Published 2024-02-28 · Updated 2026-05-23

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-401.

Summary

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]

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00246 15th percentileScored 2026-11-07

Fix Partial Linux (Linux): 5.10.38, 5.11.22, 5.12.5 +1Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	5.10.20 to before 5.10.38; 5.11.3 to before 5.11.22	5.10.38, 5.11.22	Patch available	CNA
Linux	Linux	5.12 and later	5.10.38, 5.11.22, 5.12.5, 5.13	Patch available	CNA

Linux VendorLinux Affected 5.10.20 to before 5.10.38; 5.11.3 to before 5.11.22 Fixed in 5.10.38, 5.11.22 Patch available CNA
Linux VendorLinux Affected 5.12 and later Fixed in 5.10.38, 5.11.22, 5.12.5, 5.13 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	5.10.20 to before 5.10.38; 5.11.3 to before 5.11.22; 5.12 to before 5.12.5	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:5.12:rc1::::::	5.12 rc1	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.20 to before 5.10.38; 5.11.3 to before 5.11.22; 5.12 to before 5.12.5 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:5.12:rc1:*:*:*:*:*:* Versions 5.12 rc1 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 5.10.38, 5.11.22
Fix · CNA Linux (Linux) Fixed in 5.10.38, 5.11.22, 5.12.5, 5.13

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Out of support scope

Not affected: 2 products

Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2021-47009
2026-10-03 Alias added: GHSA-fq4x-x6f2-9q95

References

Patch 4

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences