# CVE-2022-49304: linux: In the Linux kernel, the following vulnerability has been resolved:  drivers: tty: serial: Fix deadlock in sa1100_set...

CVE-2022-49304 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49304, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49304
- 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:  drivers: tty: serial: Fix deadlock in sa1100_set_termios()  There is a deadlock in sa1100_set_termios(), which is shown below:     (Thread 1)              |      (Thread 2)                            | sa1100_enable_ms() sa1100_set_termios()       |  mod_timer()  spin_lock_irqsave() //(1) |  (wait a time)  ...                       | sa1100_timeout()  del_timer_sync()          |  spin_lock_irqsave() //(2)  (wait timer to stop)      |  ...  We hold sport->port.lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need sport->port.lock in position (2) of thread 2. As a result, sa1100_set_termios() will block forever.  This patch moves del_timer_sync() before spin_lock_irqsave() in order to prevent the deadlock.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49304](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49304.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49304](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49304.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49304](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49304.md) | Feb 26, 2025 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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