Use-after-free in Linux kernel - CVE-2022-49761
Published: March 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106176
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-2022-49761
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 run_one_delayed_ref() and btrfs_run_delayed_refs_for_head() functions in fs/btrfs/extent-tree.c. A local user can escalate privileges on the system.
How to mitigate CVE-2022-49761
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/18bd1c9c02e64a3567f90c83c2c8b855531c8098
- https://git.kernel.org/stable/c/39f501d68ec1ed5cd5c66ac6ec2a7131c517bb92
- https://git.kernel.org/stable/c/853ffa1511b058c79a4c9bb1407b3b20ce311792
- https://git.kernel.org/stable/c/fdb4a70bb768d2a87890409597529ad81cb3de8a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.90