CVE-2022-50577
Description
In the Linux kernel, the following vulnerability has been resolved: ima: Fix memory leak in __ima_inode_hash() Commit f3cc6b25dcc5 ("ima: always measure and audit files in policy") lets measurement or audit happen even if the file digest cannot be calculated. As a result, iint->ima_hash could have been allocated despite ima_collect_measurement() returning an error. Since ima_hash belongs to a temporary inode metadata structure, declared at the beginning of __ima_inode_hash(), just add a kfree() call if ima_collect_measurement() returns an error different from -ENOMEM (in that case, ima_hash should not have been allocated).
How to fix
- Linux Linuxc4df8cb38f139ed9f4296868c0a6f15a26e8c491, f375bcf69f58fd0744c9dfd1b6b891a27301d67b, 8c1d6a050a0f16e0a9d32eaf53b965c77279c6f8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 280fe8367b0dc45b6ac5e04fad03e16e99540c0c ≤ v < c4df8cb38f139ed9f4296868c0a6f15a26e8c491, 280fe8367b0dc45b6ac5e04fad03e16e99540c0c ≤ v < f375bcf69f58fd0744c9dfd1b6b891a27301d67b, 280fe8367b0dc45b6ac5e04fad03e16e99540c0c ≤ v < 8c1d6a050a0f16e0a9d32eaf53b965c77279c6f8, 5.18 | c4df8cb38f139ed9f4296868c0a6f15a26e8c491, f375bcf69f58fd0744c9dfd1b6b891a27301d67b, 8c1d6a050a0f16e0a9d32eaf53b965c77279c6f8 |
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