# CVE-2022-49761: linux: In the Linux kernel, the following vulnerability has been resolved:  btrfs: always report error in run_one_delayed_re...

CVE-2022-49761 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49761, released March 27, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49761
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 27, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  btrfs: always report error in run_one_delayed_ref()  Currently we have a btrfs_debug() for run_one_delayed_ref() failure, but if end users hit such problem, there will be no chance that btrfs_debug() is enabled.  This can lead to very little useful info for debugging.  This patch will:  - Add extra info for error reporting   Including:   * logical bytenr   * num_bytes   * type   * action   * ref_mod  - Replace the btrfs_debug() with btrfs_err()  - Move the error reporting into run_one_delayed_ref()   This is to avoid use-after-free, the @node can be freed in the caller.  This error should only be triggered at most once.  As if run_one_delayed_ref() failed, we trigger the error message, then causing the call chain to error out:  btrfs_run_delayed_refs() `- btrfs_run_delayed_refs()    `- btrfs_run_delayed_refs_for_head()       `- run_one_delayed_ref()  And we will abort the current transaction in btrfs_run_delayed_refs(). If we have to run delayed refs for the abort transaction, run_one_delayed_ref() will just cleanup the refs and do nothing, thus no new error messages would be output.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.8-1 | [DEBIAN-CVE-2022-49761](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49761.md) | Mar 27, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.8-1 | [DEBIAN-CVE-2022-49761](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49761.md) | Mar 27, 2025 |
| Linux | linux Debian 14 | 6.1.8-1 | [DEBIAN-CVE-2022-49761](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49761.md) | Mar 27, 2025 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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