SB2024053150 - Use-after-free in Linux kernel hardware mISDN driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053150
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-47356)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the HFC_cleanup() function in drivers/isdn/hardware/mISDN/hfcpci.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe
- https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7
- https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5
- https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124
- https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0
- https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d
- https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020
- https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda
- https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.276
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.51
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.133