# CVE-2022-49849: linux: In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix match incorrectly in dev_args_match_d...

CVE-2022-49849 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49849, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49849
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix match incorrectly in dev_args_match_device  syzkaller found a failed assertion:    assertion failed: (args->devid != (u64)-1) || args->missing, in fs/btrfs/volumes.c:6921  This can be triggered when we set devid to (u64)-1 by ioctl. In this case, the match of devid will be skipped and the match of device may succeed incorrectly.  Patch 562d7b1512f7 introduced this function which is used to match device. This function contains two matching scenarios, we can distinguish them by checking the value of args->missing rather than check whether args->devid and args->uuid is default value.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49849](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49849.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49849](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49849.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49849](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49849.md) | May 1, 2025 |

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