发布时间: 2024年5月27日
修改时间: 2024年5月27日
In the Linux kernel, the following vulnerability has been resolved:erofs: fix inconsistent per-file compression formatEROFS can select compression algorithms on a per-file basis, and eachper-file compression algorithm needs to be marked in the on-disksuperblock for initialization.However, syzkaller can generate inconsistent crafted images that usean unsupported algorithmtype for specific inodes, e.g. use MicroLZMAalgorithmtype even it s not set in `sbi->available_compr_algs`. Thiscan lead to an unexpected BUG: kernel NULL pointer dereference ifthe corresponding decompressor isn t built-in.Fix this by checking against `sbi->available_compr_algs` for eachm_algorithmformat request. Incorrect !erofs_sb_has_compr_cfgs presetbitmap is now fixed together since it was harmless previously.
| NVD | openEuler | |
|---|---|---|
| CVSS评分 | 5.5 | 5.5 |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality | None | None |
| Integrity | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-2230 | In the Linux kernel, the following vulnerability has been resolved:erofs: fix inconsistent per-file compression formatEROFS can select compression algorithms on a per-file basis, and eachper-file compression algorithm needs to be marked in the on-disksuperblock for initialization.However, syzkaller can generate inconsistent crafted images that usean unsupported algorithmtype for specific inodes, e.g. use MicroLZMAalgorithmtype even it s not set in `sbi->available_compr_algs`. Thiscan lead to an unexpected BUG: kernel NULL pointer dereference ifthe corresponding decompressor isn t built-in.Fix this by checking against `sbi->available_compr_algs` for eachm_algorithmformat request. Incorrect !erofs_sb_has_compr_cfgs presetbitmap is now fixed together since it was harmless previously. | 2024年5月27日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-4A | kernel | Unaffected |
| KY3.4-5 | kernel | Unaffected |
| KY3.5.1 | kernel | Unaffected |
| KY3.5.2 | kernel | Unaffected |
