# CVE-2022-49914: linux: In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix inode list leak during backref walkin...

CVE-2022-49914 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49914, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49914
- 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 inode list leak during backref walking at resolve_indirect_refs()  During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes.  Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.8-1 | [DEBIAN-CVE-2022-49914](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49914.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.8-1 | [DEBIAN-CVE-2022-49914](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49914.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.8-1 | [DEBIAN-CVE-2022-49914](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49914.md) | May 1, 2025 |

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