SB2024061056 - Memory leak in Linux kernel 8021q
Published: June 10, 2024 Updated: May 13, 2025
Security Bulletin ID
SB2024061056
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory leak (CVE-ID: CVE-2021-47555)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the vlan_dev_init() function in net/8021q/vlan_dev.c, within the register_vlan_dev() function in net/8021q/vlan.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/5e44178864b38dd70b877985abd7d86fdb95f27d
- https://git.kernel.org/stable/c/6e800ee43218a56acc93676bbb3d93b74779e555
- https://git.kernel.org/stable/c/f7fc72a508cf115c273a7a29350069def1041890
- https://git.kernel.org/stable/c/01d9cc2dea3fde3bad6d27f464eff463496e2b00
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.163