CVE-2022-49388 ubi: ubi_create_volume: Fix use-after-free when volume creation failed
A use-after-free vulnerability in the Linux kernel UBI driver allows attackers to potentially execute code or escalate privileges via volume creation errors.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49388?
CVE-2022-49388 is a high-severity use after free vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ubi: ubi_create_volume: Fix use-after-free when volume creation failed
There is an use-after-free problem for 'eba_tbl' in ubi_create_volume()'s error handling path:
ubi_eba_replace_table(vol, eba_tbl) vol->eba_tbl = tbl out_mapping: ubi_eba_destroy_table(eba_tbl) // Free 'eba_tbl' out_unlock: put_device(&vol->dev) vol_release kfree(tbl->entries) // UAF
Fix it by removing redundant 'eba_tbl' releasing. Fetch a reproducer in [Link].
Weakness: CWE-416
Which versions are affected by CVE-2022-49388?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49388?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2022-49388 being exploited?
There is no known exploitation of CVE-2022-49388 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49388, GHSA-422g-php3-xrv4, UBUNTU-CVE-2022-49388.