# CVE-2022-49406: linux: In the Linux kernel, the following vulnerability has been resolved:  block: Fix potential deadlock in blk_ia_range_sy...

CVE-2022-49406 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49406, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49406
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  block: Fix potential deadlock in blk_ia_range_sysfs_show()  When being read, a sysfs attribute is already protected against removal with the kobject node active reference counter. As a result, in blk_ia_range_sysfs_show(), there is no need to take the queue sysfs lock when reading the value of a range attribute. Using the queue sysfs lock in this function creates a potential deadlock situation with the disk removal, something that a lockdep signals with a splat when the device is removed:  [  760.703551]  Possible unsafe locking scenario: [  760.703551] [  760.703554]        CPU0                    CPU1 [  760.703556]        ----                    ---- [  760.703558]   lock(&q->sysfs_lock); [  760.703565]                                lock(kn->active#385); [  760.703573]                                lock(&q->sysfs_lock); [  760.703579]   lock(kn->active#385); [  760.703587] [  760.703587]  *** DEADLOCK ***  Solve this by removing the mutex_lock()/mutex_unlock() calls from blk_ia_range_sysfs_show().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49406](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49406.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49406](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49406.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49406](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49406.md) | Feb 26, 2025 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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