Use-after-free in Linux kernel - CVE-2022-49622
Published: February 26, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU104454
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2022-49622
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the DEFINE_STATIC_KEY_FALSE(), nft_trace_notify() and nft_trace_init() functions in net/netfilter/nf_tables_trace.c, within the __nft_trace_packet(), nft_trace_packet() and __nft_trace_verdict() functions in net/netfilter/nf_tables_core.c. A local user can escalate privileges on the system.
Affected software
Linux kernel
How to mitigate CVE-2022-49622
Install update from vendor's website.
Linux kernel - addressed in versions 5.18.13, 5.19