SB20240531167 - Use-after-free in Linux kernel spi driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531167
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-2021-46959)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the devm_spi_alloc_master(), devm_spi_register_master() and spi_unregister_master() functions in drivers/spi/spi.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815
- https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e
- https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c
- https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4
- https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74
- https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1
- https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7
- https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6
- https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.233
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.191
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.271
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.271
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.119