CVE-2022-49388: ubi: ubi_create_volume: Fix use-after-free when volume creation failed
First published: Wed Feb 26 2025(Updated: )
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].
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=4.12<4.14.283 | |
| Linux Kernel | >=4.15<4.19.247 | |
| Linux Kernel | >=4.20<5.4.198 | |
| Linux Kernel | >=5.5<5.10.122 | |
| Linux Kernel | >=5.11<5.15.47 | |
| Linux Kernel | >=5.16<5.17.15 | |
| Linux Kernel | >=5.18<5.18.4 |
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Reference Links
- https://git.kernel.org/stable/c/25ff1e3a1351c0d936dd1ac2f9e58231ea1510c9
- https://git.kernel.org/stable/c/abb67043060f2bf4c03d7c3debb9ae980e2b6db3
- https://git.kernel.org/stable/c/8302620aeb940f386817321d272b12411ae7d39f
- https://git.kernel.org/stable/c/6d8d3f68cbecfd31925796f0fb668eb21ab06734
- https://git.kernel.org/stable/c/5ff2514e4fb55dcf3d88294686040ca73ea0c1a2
- https://git.kernel.org/stable/c/e27ecf325e51abd06aaefba57a6322a46fa4178b
- https://git.kernel.org/stable/c/1174ab8ba36a48025b68b5ff1085000b1e510217
- https://git.kernel.org/stable/c/8c03a1c21d72210f81cb369cc528e3fde4b45411
Frequently Asked Questions
What is the severity of CVE-2022-49388?
CVE-2022-49388 has been classified as a high severity vulnerability in the Linux kernel.
How do I fix CVE-2022-49388?
To fix CVE-2022-49388, update your Linux kernel to a version that is not affected by the vulnerability.
What versions of the Linux kernel are affected by CVE-2022-49388?
CVE-2022-49388 affects multiple versions of the Linux kernel prior to 4.14.283, 4.19.247, 5.4.198, 5.10.122, 5.15.47, 5.17.15, and 5.18.4.
What types of systems are impacted by CVE-2022-49388?
CVE-2022-49388 impacts systems running affected versions of the Linux kernel, commonly found in various distributions.
What is the nature of the vulnerability in CVE-2022-49388?
CVE-2022-49388 is a use-after-free vulnerability occurring during error handling in the ubi_create_volume function.
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