SB20250226233 - Use-after-free in Linux kernel mediatek mt76 driver
Published: February 26, 2025 Updated: May 11, 2025
Security Bulletin ID
SB20250226233
CSH 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 vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-49479)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the mt76_tx_status_skb_add() function in drivers/net/wireless/mediatek/mt76/tx.c, within the mt76_sta_pre_rcu_remove() function in drivers/net/wireless/mediatek/mt76/mac80211.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/ddd426d72aca4054045a9bd3b80a4ce1d398f11f
- https://git.kernel.org/stable/c/ef7f9f894cfd0b2e471206409a529af4a26ddd55
- https://git.kernel.org/stable/c/fcfe1b5e162bf473c1d47760962cec8523c00466
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19