Use-after-free in Linux kernel - CVE-2022-49740
Published: March 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106169
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2022-49740
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the brcmf_construct_chaninfo() and brcmf_enable_bw40_2g() functions in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c. A local user can escalate privileges on the system.
How to mitigate CVE-2022-49740
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/4920ab131b2dbae7464b72bdcac465d070254209
- https://git.kernel.org/stable/c/9cf5e99c1ae1a85286a76c9a970202750538394c
- https://git.kernel.org/stable/c/b2e412879595821ff1b5545cbed5f108fba7f5b6
- https://git.kernel.org/stable/c/e4991910f15013db72f6ec0db7038ea67a57052e
- https://git.kernel.org/stable/c/f06de1bb6d61f0c18b0213bbc6298960037f9d42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.11