CVE-2022-49304

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Source
https://cve.org/CVERecord?id=CVE-2022-49304
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49304.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49304
Downstream
Related
Published
2025-02-26T02:10:37.726Z
Modified
2026-03-12T03:24:59.576839Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
drivers: tty: serial: Fix deadlock in sa1100_set_termios()
Details

In the Linux kernel, the following vulnerability has been resolved:

drivers: tty: serial: Fix deadlock in sa1100settermios()

There is a deadlock in sa1100settermios(), which is shown below:

(Thread 1) | (Thread 2) | sa1100enablems() sa1100settermios() | modtimer() spinlockirqsave() //(1) | (wait a time) ... | sa1100timeout() deltimersync() | spinlockirqsave() //(2) (wait timer to stop) | ...

We hold sport->port.lock in position (1) of thread 1 and use deltimersync() to wait timer to stop, but timer handler also need sport->port.lock in position (2) of thread 2. As a result, sa1100settermios() will block forever.

This patch moves deltimersync() before spinlockirqsave() in order to prevent the deadlock.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49304.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed
0976808d0d171ec837d4bd3e9f4ad4a00ab703b8
Fixed
85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2
Fixed
920f0ae7a129ffee98a106e3bbdfd61a2a59e939
Fixed
09a5958a2452ad22d0cb638711ef34ea1863a829
Fixed
6e2273eefab54a521d9c59efb6e1114e742bdf41
Fixed
2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b
Fixed
553213432ef0c295becdc08c0207d2094468f673
Fixed
34d91e555e5582cffdbcbb75517bc9217866823e
Fixed
62b2caef400c1738b6d22f636c628d9f85cd4c4c

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49304.json"