# CVE-2022-49149: linux: In the Linux kernel, the following vulnerability has been resolved:  rxrpc: Fix call timer start racing with call des...

CVE-2022-49149 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49149, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49149
- Priority: Routine
- CVSS: 4.7 (medium)
- EPSS: 0.0050
- 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:  rxrpc: Fix call timer start racing with call destruction  The rxrpc_call struct has a timer used to handle various timed events relating to a call.  This timer can get started from the packet input routines that are run in softirq mode with just the RCU read lock held. Unfortunately, because only the RCU read lock is held - and neither ref or other lock is taken - the call can start getting destroyed at the same time a packet comes in addressed to that call.  This causes the timer - which was already stopped - to get restarted.  Later, the timer dispatch code may then oops if the timer got deallocated first.  Fix this by trying to take a ref on the rxrpc_call struct and, if successful, passing that ref along to the timer.  If the timer was already running, the ref is discarded.  The timer completion routine can then pass the ref along to the call's work item when it queues it.  If the timer or work item where already queued/running, the extra ref is discarded.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.17.3-1 | [DEBIAN-CVE-2022-49149](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49149.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.17.3-1 | [DEBIAN-CVE-2022-49149](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49149.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.17.3-1 | [DEBIAN-CVE-2022-49149](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49149.md) | Feb 26, 2025 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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