TI-2021-18530 Aliases CVE-2021-42008 GHSA-qv6w-x298-fgf8

The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before…

LOW 37CWE-787Published 2021-10-04 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab out-of-bounds write. Input from a process that has the CAP_NET_ADMIN capability can lead to root access.

Why it matters now

EPSS 0.01561 75th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 20

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	2.6.12 to before 4.4.282; 4.5 to before 4.9.281; 4.10 to before 4.14.245; 4.15 to before 4.19.205; 4.20 to before 5.4.143; 5.5 to before 5.10.61; 5.11 to before 5.13.13	Vulnerable	Linux
cpe:2.3:o:netapp:h300s_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h300s:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h500s_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h500s:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h700s_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h700s:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h300e_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h300e:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h500e_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.12 to before 4.4.282; 4.5 to before 4.9.281; 4.10 to before 4.14.245; 4.15 to before 4.19.205; 4.20 to before 5.4.143; 5.5 to before 5.10.61; 5.11 to before 5.13.13 Vulnerable ·Linux
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp

Show 10 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:h:netapp:h500e:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h700e_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h700e:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h410s_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h410s:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:h410c_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:h410c:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:::::::*	not specified by NVD	Vulnerable	NetApp
cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:::::::*	not specified by NVD	Running on	NetApp
cpe:2.3:o:debian:debian_linux:9.0:::::::*	9.0	Vulnerable	Debian

cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

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

Not affected: 4 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2021-42008
2026-10-03 Alias added: GHSA-qv6w-x298-fgf8

References

Exploit 1

https://www.youtube.com/watch?v=d5f9xLK8Vhw

Patch 1

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19d1532a187669ce86d5a2696eb7275310070793

Advisory 3

Sources

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