Use-after-free in Linux kernel - CVE-2022-48733
Published: June 20, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92895
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-2022-48733
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 btrfs_wait_delalloc_flush() and btrfs_commit_transaction() functions in fs/btrfs/transaction.c, within the create_snapshot() function in fs/btrfs/ioctl.c. A local user can escalate privileges on the system.
How to mitigate CVE-2022-48733
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/a7b717fa15165d3d9245614680bebc48a52ac05d
- https://git.kernel.org/stable/c/9372fa1d73da5f1673921e365d0cd2c27ec7adc2
- https://git.kernel.org/stable/c/28b21c558a3753171097193b6f6602a94169093a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.226
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17