SB2024053118 - Use-after-free in Linux kernel can j1939
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053118
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-2021-47232)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the j1939_session_skb_drop_old(), j1939_session_skb_queue(), j1939_session_skb_find_by_offset(), j1939_session_tx_dat(), j1939_xtp_txnext_receiver(), j1939_simple_txnext(), j1939_session_completed() and j1939_xtp_rx_dat_one() functions in net/can/j1939/transport.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256
- https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22
- https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705
- https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.128